diff --git a/src/diagrams/sequenceDiagram/parser/sequenceDiagram.jison b/src/diagrams/sequenceDiagram/parser/sequenceDiagram.jison
index 58772eae31..8a0f9a9e52 100644
--- a/src/diagrams/sequenceDiagram/parser/sequenceDiagram.jison
+++ b/src/diagrams/sequenceDiagram/parser/sequenceDiagram.jison
@@ -34,6 +34,8 @@
 "opt"             { this.begin('LINE'); return 'opt'; }
 "alt"             { this.begin('LINE'); return 'alt'; }
 "else"            { this.begin('LINE'); return 'else'; }
+"par"             { this.begin('LINE'); return 'par'; }
+"and"             { this.begin('LINE'); return 'and'; }
 <LINE>[^#\n;]*    { this.popState(); return 'restOfLine'; }
 "end"             return 'end';
 "left of"         return 'left_of';
@@ -115,6 +117,20 @@ statement
 		$3.push({type: 'altEnd', signalType: yy.LINETYPE.ALT_END});
 
 		$$=$3;}
+	| par restOfLine par_sections end
+	{
+		// Parallel start
+		$3.unshift({type: 'parStart', parText:$2, signalType: yy.LINETYPE.PAR_START});
+		// Content in par is already in $3
+		// End
+		$3.push({type: 'parEnd', signalType: yy.LINETYPE.PAR_END});
+		$$=$3;}
+	;
+
+par_sections
+	: document
+	| document and restOfLine par_sections
+	{ $$ = $1.concat([{type: 'and', parText:$3, signalType: yy.LINETYPE.PAR_AND}, $4]); }
 	;
 
 note_statement
diff --git a/src/diagrams/sequenceDiagram/parser/sequenceDiagram.js b/src/diagrams/sequenceDiagram/parser/sequenceDiagram.js
index d14aa22950..e8c38facb0 100644
--- a/src/diagrams/sequenceDiagram/parser/sequenceDiagram.js
+++ b/src/diagrams/sequenceDiagram/parser/sequenceDiagram.js
@@ -72,12 +72,12 @@
   }
 */
 var parser = (function(){
-var o=function(k,v,o,l){for(o=o||{},l=k.length;l--;o[k[l]]=v);return o},$V0=[1,2],$V1=[1,3],$V2=[1,4],$V3=[2,4],$V4=[1,9],$V5=[1,11],$V6=[1,12],$V7=[1,14],$V8=[1,15],$V9=[1,17],$Va=[1,18],$Vb=[1,19],$Vc=[1,20],$Vd=[1,22],$Ve=[1,23],$Vf=[1,4,5,10,15,16,18,20,21,22,23,24,25,36],$Vg=[1,31],$Vh=[4,5,10,15,16,18,20,21,22,23,25,36],$Vi=[34,35,36];
+var o=function(k,v,o,l){for(o=o||{},l=k.length;l--;o[k[l]]=v);return o},$V0=[1,2],$V1=[1,3],$V2=[1,4],$V3=[2,4],$V4=[1,9],$V5=[1,11],$V6=[1,12],$V7=[1,14],$V8=[1,15],$V9=[1,17],$Va=[1,18],$Vb=[1,19],$Vc=[1,20],$Vd=[1,21],$Ve=[1,23],$Vf=[1,24],$Vg=[1,4,5,10,15,16,18,20,21,22,23,24,25,27,28,39],$Vh=[1,32],$Vi=[4,5,10,15,16,18,20,21,22,23,25,28,39],$Vj=[4,5,10,15,16,18,20,21,22,23,25,27,28,39],$Vk=[37,38,39];
 var parser = {trace: function trace() { },
 yy: {},
-symbols_: {"error":2,"start":3,"SPACE":4,"NL":5,"SD":6,"document":7,"line":8,"statement":9,"participant":10,"actor":11,"AS":12,"restOfLine":13,"signal":14,"activate":15,"deactivate":16,"note_statement":17,"title":18,"text2":19,"loop":20,"end":21,"opt":22,"alt":23,"else":24,"note":25,"placement":26,"over":27,"actor_pair":28,"spaceList":29,",":30,"left_of":31,"right_of":32,"signaltype":33,"+":34,"-":35,"ACTOR":36,"SOLID_OPEN_ARROW":37,"DOTTED_OPEN_ARROW":38,"SOLID_ARROW":39,"DOTTED_ARROW":40,"SOLID_CROSS":41,"DOTTED_CROSS":42,"TXT":43,"$accept":0,"$end":1},
-terminals_: {2:"error",4:"SPACE",5:"NL",6:"SD",10:"participant",12:"AS",13:"restOfLine",15:"activate",16:"deactivate",18:"title",20:"loop",21:"end",22:"opt",23:"alt",24:"else",25:"note",27:"over",30:",",31:"left_of",32:"right_of",34:"+",35:"-",36:"ACTOR",37:"SOLID_OPEN_ARROW",38:"DOTTED_OPEN_ARROW",39:"SOLID_ARROW",40:"DOTTED_ARROW",41:"SOLID_CROSS",42:"DOTTED_CROSS",43:"TXT"},
-productions_: [0,[3,2],[3,2],[3,2],[7,0],[7,2],[8,2],[8,1],[8,1],[9,5],[9,3],[9,2],[9,3],[9,3],[9,2],[9,3],[9,4],[9,4],[9,7],[17,4],[17,4],[29,2],[29,1],[28,3],[28,1],[26,1],[26,1],[14,5],[14,5],[14,4],[11,1],[33,1],[33,1],[33,1],[33,1],[33,1],[33,1],[19,1]],
+symbols_: {"error":2,"start":3,"SPACE":4,"NL":5,"SD":6,"document":7,"line":8,"statement":9,"participant":10,"actor":11,"AS":12,"restOfLine":13,"signal":14,"activate":15,"deactivate":16,"note_statement":17,"title":18,"text2":19,"loop":20,"end":21,"opt":22,"alt":23,"else":24,"par":25,"par_sections":26,"and":27,"note":28,"placement":29,"over":30,"actor_pair":31,"spaceList":32,",":33,"left_of":34,"right_of":35,"signaltype":36,"+":37,"-":38,"ACTOR":39,"SOLID_OPEN_ARROW":40,"DOTTED_OPEN_ARROW":41,"SOLID_ARROW":42,"DOTTED_ARROW":43,"SOLID_CROSS":44,"DOTTED_CROSS":45,"TXT":46,"$accept":0,"$end":1},
+terminals_: {2:"error",4:"SPACE",5:"NL",6:"SD",10:"participant",12:"AS",13:"restOfLine",15:"activate",16:"deactivate",18:"title",20:"loop",21:"end",22:"opt",23:"alt",24:"else",25:"par",27:"and",28:"note",30:"over",33:",",34:"left_of",35:"right_of",37:"+",38:"-",39:"ACTOR",40:"SOLID_OPEN_ARROW",41:"DOTTED_OPEN_ARROW",42:"SOLID_ARROW",43:"DOTTED_ARROW",44:"SOLID_CROSS",45:"DOTTED_CROSS",46:"TXT"},
+productions_: [0,[3,2],[3,2],[3,2],[7,0],[7,2],[8,2],[8,1],[8,1],[9,5],[9,3],[9,2],[9,3],[9,3],[9,2],[9,3],[9,4],[9,4],[9,7],[9,4],[26,1],[26,4],[17,4],[17,4],[32,2],[32,1],[31,3],[31,1],[29,1],[29,1],[14,5],[14,5],[14,4],[11,1],[36,1],[36,1],[36,1],[36,1],[36,1],[36,1],[19,1]],
 performAction: function anonymous(yytext, yyleng, yylineno, yy, yystate /* action[1] */, $$ /* vstack */, _$ /* lstack */) {
 /* this == yyval */
 
@@ -141,9 +141,21 @@ case 18:
 break;
 case 19:
 
+		// Parallel start
+		$$[$0-1].unshift({type: 'parStart', parText:$$[$0-2], signalType: yy.LINETYPE.PAR_START});
+		// Content in par is already in $$[$0-1]
+		// End
+		$$[$0-1].push({type: 'parEnd', signalType: yy.LINETYPE.PAR_END});
+		this.$=$$[$0-1];
+break;
+case 21:
+ this.$ = $$[$0-3].concat([{type: 'and', parText:$$[$0-1], signalType: yy.LINETYPE.PAR_AND}, $$[$0]]); 
+break;
+case 22:
+
 		this.$ = [$$[$0-1], {type:'addNote', placement:$$[$0-2], actor:$$[$0-1].actor, text:$$[$0]}];
 break;
-case 20:
+case 23:
 
 		// Coerce actor_pair into a [to, from, ...] array
 		$$[$0-2] = [].concat($$[$0-1], $$[$0-1]).slice(0, 2);
@@ -151,70 +163,66 @@ case 20:
 		$$[$0-2][1] = $$[$0-2][1].actor;
 		this.$ = [$$[$0-1], {type:'addNote', placement:yy.PLACEMENT.OVER, actor:$$[$0-2].slice(0, 2), text:$$[$0]}];
 break;
-case 23:
+case 26:
  this.$ = [$$[$0-2], $$[$0]]; 
 break;
-case 24:
+case 27:
  this.$ = $$[$0]; 
 break;
-case 25:
+case 28:
  this.$ = yy.PLACEMENT.LEFTOF; 
 break;
-case 26:
+case 29:
  this.$ = yy.PLACEMENT.RIGHTOF; 
 break;
-case 27:
+case 30:
  this.$ = [$$[$0-4],$$[$0-1],{type: 'addMessage', from:$$[$0-4].actor, to:$$[$0-1].actor, signalType:$$[$0-3], msg:$$[$0]},
 	              {type: 'activeStart', signalType: yy.LINETYPE.ACTIVE_START, actor: $$[$0-1]}
 	             ]
 break;
-case 28:
+case 31:
  this.$ = [$$[$0-4],$$[$0-1],{type: 'addMessage', from:$$[$0-4].actor, to:$$[$0-1].actor, signalType:$$[$0-3], msg:$$[$0]},
 	             {type: 'activeEnd', signalType: yy.LINETYPE.ACTIVE_END, actor: $$[$0-4]}
 	             ]
 break;
-case 29:
+case 32:
  this.$ = [$$[$0-3],$$[$0-1],{type: 'addMessage', from:$$[$0-3].actor, to:$$[$0-1].actor, signalType:$$[$0-2], msg:$$[$0]}]
 break;
-case 30:
+case 33:
 this.$={type: 'addActor', actor:$$[$0]}
 break;
-case 31:
+case 34:
  this.$ = yy.LINETYPE.SOLID_OPEN; 
 break;
-case 32:
+case 35:
  this.$ = yy.LINETYPE.DOTTED_OPEN; 
 break;
-case 33:
+case 36:
  this.$ = yy.LINETYPE.SOLID; 
 break;
-case 34:
+case 37:
  this.$ = yy.LINETYPE.DOTTED; 
 break;
-case 35:
+case 38:
  this.$ = yy.LINETYPE.SOLID_CROSS; 
 break;
-case 36:
+case 39:
  this.$ = yy.LINETYPE.DOTTED_CROSS; 
 break;
-case 37:
+case 40:
 this.$ = $$[$0].substring(1).trim().replace(/\\n/gm, "\n");
 break;
 }
 },
-table: [{3:1,4:$V0,5:$V1,6:$V2},{1:[3]},{3:5,4:$V0,5:$V1,6:$V2},{3:6,4:$V0,5:$V1,6:$V2},o([1,4,5,10,15,16,18,20,22,23,25,36],$V3,{7:7}),{1:[2,1]},{1:[2,2]},{1:[2,3],4:$V4,5:$V5,8:8,9:10,10:$V6,11:21,14:13,15:$V7,16:$V8,17:16,18:$V9,20:$Va,22:$Vb,23:$Vc,25:$Vd,36:$Ve},o($Vf,[2,5]),{9:24,10:$V6,11:21,14:13,15:$V7,16:$V8,17:16,18:$V9,20:$Va,22:$Vb,23:$Vc,25:$Vd,36:$Ve},o($Vf,[2,7]),o($Vf,[2,8]),{11:25,36:$Ve},{5:[1,26]},{11:27,36:$Ve},{11:28,36:$Ve},{5:[1,29]},{19:30,43:$Vg},{13:[1,32]},{13:[1,33]},{13:[1,34]},{33:35,37:[1,36],38:[1,37],39:[1,38],40:[1,39],41:[1,40],42:[1,41]},{26:42,27:[1,43],31:[1,44],32:[1,45]},o([5,12,30,37,38,39,40,41,42,43],[2,30]),o($Vf,[2,6]),{5:[1,47],12:[1,46]},o($Vf,[2,11]),{5:[1,48]},{5:[1,49]},o($Vf,[2,14]),{5:[1,50]},{5:[2,37]},o($Vh,$V3,{7:51}),o($Vh,$V3,{7:52}),o([4,5,10,15,16,18,20,22,23,24,25,36],$V3,{7:53}),{11:56,34:[1,54],35:[1,55],36:$Ve},o($Vi,[2,31]),o($Vi,[2,32]),o($Vi,[2,33]),o($Vi,[2,34]),o($Vi,[2,35]),o($Vi,[2,36]),{11:57,36:$Ve},{11:59,28:58,36:$Ve},{36:[2,25]},{36:[2,26]},{13:[1,60]},o($Vf,[2,10]),o($Vf,[2,12]),o($Vf,[2,13]),o($Vf,[2,15]),{4:$V4,5:$V5,8:8,9:10,10:$V6,11:21,14:13,15:$V7,16:$V8,17:16,18:$V9,20:$Va,21:[1,61],22:$Vb,23:$Vc,25:$Vd,36:$Ve},{4:$V4,5:$V5,8:8,9:10,10:$V6,11:21,14:13,15:$V7,16:$V8,17:16,18:$V9,20:$Va,21:[1,62],22:$Vb,23:$Vc,25:$Vd,36:$Ve},{4:$V4,5:$V5,8:8,9:10,10:$V6,11:21,14:13,15:$V7,16:$V8,17:16,18:$V9,20:$Va,22:$Vb,23:$Vc,24:[1,63],25:$Vd,36:$Ve},{11:64,36:$Ve},{11:65,36:$Ve},{19:66,43:$Vg},{19:67,43:$Vg},{19:68,43:$Vg},{30:[1,69],43:[2,24]},{5:[1,70]},o($Vf,[2,16]),o($Vf,[2,17]),{13:[1,71]},{19:72,43:$Vg},{19:73,43:$Vg},{5:[2,29]},{5:[2,19]},{5:[2,20]},{11:74,36:$Ve},o($Vf,[2,9]),o($Vh,$V3,{7:75}),{5:[2,27]},{5:[2,28]},{43:[2,23]},{4:$V4,5:$V5,8:8,9:10,10:$V6,11:21,14:13,15:$V7,16:$V8,17:16,18:$V9,20:$Va,21:[1,76],22:$Vb,23:$Vc,25:$Vd,36:$Ve},o($Vf,[2,18])],
-defaultActions: {5:[2,1],6:[2,2],31:[2,37],44:[2,25],45:[2,26],66:[2,29],67:[2,19],68:[2,20],72:[2,27],73:[2,28],74:[2,23]},
+table: [{3:1,4:$V0,5:$V1,6:$V2},{1:[3]},{3:5,4:$V0,5:$V1,6:$V2},{3:6,4:$V0,5:$V1,6:$V2},o([1,4,5,10,15,16,18,20,22,23,25,28,39],$V3,{7:7}),{1:[2,1]},{1:[2,2]},{1:[2,3],4:$V4,5:$V5,8:8,9:10,10:$V6,11:22,14:13,15:$V7,16:$V8,17:16,18:$V9,20:$Va,22:$Vb,23:$Vc,25:$Vd,28:$Ve,39:$Vf},o($Vg,[2,5]),{9:25,10:$V6,11:22,14:13,15:$V7,16:$V8,17:16,18:$V9,20:$Va,22:$Vb,23:$Vc,25:$Vd,28:$Ve,39:$Vf},o($Vg,[2,7]),o($Vg,[2,8]),{11:26,39:$Vf},{5:[1,27]},{11:28,39:$Vf},{11:29,39:$Vf},{5:[1,30]},{19:31,46:$Vh},{13:[1,33]},{13:[1,34]},{13:[1,35]},{13:[1,36]},{36:37,40:[1,38],41:[1,39],42:[1,40],43:[1,41],44:[1,42],45:[1,43]},{29:44,30:[1,45],34:[1,46],35:[1,47]},o([5,12,33,40,41,42,43,44,45,46],[2,33]),o($Vg,[2,6]),{5:[1,49],12:[1,48]},o($Vg,[2,11]),{5:[1,50]},{5:[1,51]},o($Vg,[2,14]),{5:[1,52]},{5:[2,40]},o($Vi,$V3,{7:53}),o($Vi,$V3,{7:54}),o([4,5,10,15,16,18,20,22,23,24,25,28,39],$V3,{7:55}),o($Vj,$V3,{26:56,7:57}),{11:60,37:[1,58],38:[1,59],39:$Vf},o($Vk,[2,34]),o($Vk,[2,35]),o($Vk,[2,36]),o($Vk,[2,37]),o($Vk,[2,38]),o($Vk,[2,39]),{11:61,39:$Vf},{11:63,31:62,39:$Vf},{39:[2,28]},{39:[2,29]},{13:[1,64]},o($Vg,[2,10]),o($Vg,[2,12]),o($Vg,[2,13]),o($Vg,[2,15]),{4:$V4,5:$V5,8:8,9:10,10:$V6,11:22,14:13,15:$V7,16:$V8,17:16,18:$V9,20:$Va,21:[1,65],22:$Vb,23:$Vc,25:$Vd,28:$Ve,39:$Vf},{4:$V4,5:$V5,8:8,9:10,10:$V6,11:22,14:13,15:$V7,16:$V8,17:16,18:$V9,20:$Va,21:[1,66],22:$Vb,23:$Vc,25:$Vd,28:$Ve,39:$Vf},{4:$V4,5:$V5,8:8,9:10,10:$V6,11:22,14:13,15:$V7,16:$V8,17:16,18:$V9,20:$Va,22:$Vb,23:$Vc,24:[1,67],25:$Vd,28:$Ve,39:$Vf},{21:[1,68]},{4:$V4,5:$V5,8:8,9:10,10:$V6,11:22,14:13,15:$V7,16:$V8,17:16,18:$V9,20:$Va,21:[2,20],22:$Vb,23:$Vc,25:$Vd,27:[1,69],28:$Ve,39:$Vf},{11:70,39:$Vf},{11:71,39:$Vf},{19:72,46:$Vh},{19:73,46:$Vh},{19:74,46:$Vh},{33:[1,75],46:[2,27]},{5:[1,76]},o($Vg,[2,16]),o($Vg,[2,17]),{13:[1,77]},o($Vg,[2,19]),{13:[1,78]},{19:79,46:$Vh},{19:80,46:$Vh},{5:[2,32]},{5:[2,22]},{5:[2,23]},{11:81,39:$Vf},o($Vg,[2,9]),o($Vi,$V3,{7:82}),o($Vj,$V3,{7:57,26:83}),{5:[2,30]},{5:[2,31]},{46:[2,26]},{4:$V4,5:$V5,8:8,9:10,10:$V6,11:22,14:13,15:$V7,16:$V8,17:16,18:$V9,20:$Va,21:[1,84],22:$Vb,23:$Vc,25:$Vd,28:$Ve,39:$Vf},{21:[2,21]},o($Vg,[2,18])],
+defaultActions: {5:[2,1],6:[2,2],32:[2,40],46:[2,28],47:[2,29],72:[2,32],73:[2,22],74:[2,23],79:[2,30],80:[2,31],81:[2,26],83:[2,21]},
 parseError: function parseError(str, hash) {
     if (hash.recoverable) {
         this.trace(str);
     } else {
-        function _parseError (msg, hash) {
-            this.message = msg;
-            this.hash = hash;
-        }
-        _parseError.prototype = Error;
-
-        throw new _parseError(str, hash);
+        var error = new Error(str);
+        error.hash = hash;
+        throw error;
     }
 },
 parse: function parse(input) {
@@ -695,7 +703,7 @@ case 4:/* skip comments */
 break;
 case 5: this.begin('ID'); return 10; 
 break;
-case 6: this.begin('ALIAS'); return 36; 
+case 6: this.begin('ALIAS'); return 39; 
 break;
 case 7: this.popState(); this.popState(); this.begin('LINE'); return 12; 
 break;
@@ -709,58 +717,62 @@ case 11: this.begin('LINE'); return 23;
 break;
 case 12: this.begin('LINE'); return 24; 
 break;
-case 13: this.popState(); return 13; 
+case 13: this.begin('LINE'); return 25; 
+break;
+case 14: this.begin('LINE'); return 27; 
+break;
+case 15: this.popState(); return 13; 
 break;
-case 14:return 21;
+case 16:return 21;
 break;
-case 15:return 31;
+case 17:return 34;
 break;
-case 16:return 32;
+case 18:return 35;
 break;
-case 17:return 27;
+case 19:return 30;
 break;
-case 18:return 25;
+case 20:return 28;
 break;
-case 19: this.begin('ID'); return 15; 
+case 21: this.begin('ID'); return 15; 
 break;
-case 20: this.begin('ID'); return 16; 
+case 22: this.begin('ID'); return 16; 
 break;
-case 21:return 18;
+case 23:return 18;
 break;
-case 22:return 6;
+case 24:return 6;
 break;
-case 23:return 30;
+case 25:return 33;
 break;
-case 24:return 5;
+case 26:return 5;
 break;
-case 25: yy_.yytext = yy_.yytext.trim(); return 36; 
+case 27: yy_.yytext = yy_.yytext.trim(); return 39; 
 break;
-case 26:return 39;
+case 28:return 42;
 break;
-case 27:return 40;
+case 29:return 43;
 break;
-case 28:return 37;
+case 30:return 40;
 break;
-case 29:return 38;
+case 31:return 41;
 break;
-case 30:return 41;
+case 32:return 44;
 break;
-case 31:return 42;
+case 33:return 45;
 break;
-case 32:return 43;
+case 34:return 46;
 break;
-case 33:return 34;
+case 35:return 37;
 break;
-case 34:return 35;
+case 36:return 38;
 break;
-case 35:return 5;
+case 37:return 5;
 break;
-case 36:return 'INVALID';
+case 38:return 'INVALID';
 break;
 }
 },
-rules: [/^(?:[\n]+)/i,/^(?:\s+)/i,/^(?:((?!\n)\s)+)/i,/^(?:#[^\n]*)/i,/^(?:%[^\n]*)/i,/^(?:participant\b)/i,/^(?:[^\->:\n,;]+?(?=((?!\n)\s)+as(?!\n)\s|[#\n;]|$))/i,/^(?:as\b)/i,/^(?:(?:))/i,/^(?:loop\b)/i,/^(?:opt\b)/i,/^(?:alt\b)/i,/^(?:else\b)/i,/^(?:[^#\n;]*)/i,/^(?:end\b)/i,/^(?:left of\b)/i,/^(?:right of\b)/i,/^(?:over\b)/i,/^(?:note\b)/i,/^(?:activate\b)/i,/^(?:deactivate\b)/i,/^(?:title\b)/i,/^(?:sequenceDiagram\b)/i,/^(?:,)/i,/^(?:;)/i,/^(?:[^\+\->:\n,;]+)/i,/^(?:->>)/i,/^(?:-->>)/i,/^(?:->)/i,/^(?:-->)/i,/^(?:-[x])/i,/^(?:--[x])/i,/^(?::[^#\n;]+)/i,/^(?:\+)/i,/^(?:-)/i,/^(?:$)/i,/^(?:.)/i],
-conditions: {"LINE":{"rules":[2,3,13],"inclusive":false},"ALIAS":{"rules":[2,3,7,8],"inclusive":false},"ID":{"rules":[2,3,6],"inclusive":false},"INITIAL":{"rules":[0,1,3,4,5,9,10,11,12,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36],"inclusive":true}}
+rules: [/^(?:[\n]+)/i,/^(?:\s+)/i,/^(?:((?!\n)\s)+)/i,/^(?:#[^\n]*)/i,/^(?:%[^\n]*)/i,/^(?:participant\b)/i,/^(?:[^\->:\n,;]+?(?=((?!\n)\s)+as(?!\n)\s|[#\n;]|$))/i,/^(?:as\b)/i,/^(?:(?:))/i,/^(?:loop\b)/i,/^(?:opt\b)/i,/^(?:alt\b)/i,/^(?:else\b)/i,/^(?:par\b)/i,/^(?:and\b)/i,/^(?:[^#\n;]*)/i,/^(?:end\b)/i,/^(?:left of\b)/i,/^(?:right of\b)/i,/^(?:over\b)/i,/^(?:note\b)/i,/^(?:activate\b)/i,/^(?:deactivate\b)/i,/^(?:title\b)/i,/^(?:sequenceDiagram\b)/i,/^(?:,)/i,/^(?:;)/i,/^(?:[^\+\->:\n,;]+)/i,/^(?:->>)/i,/^(?:-->>)/i,/^(?:->)/i,/^(?:-->)/i,/^(?:-[x])/i,/^(?:--[x])/i,/^(?::[^#\n;]+)/i,/^(?:\+)/i,/^(?:-)/i,/^(?:$)/i,/^(?:.)/i],
+conditions: {"LINE":{"rules":[2,3,15],"inclusive":false},"ALIAS":{"rules":[2,3,7,8],"inclusive":false},"ID":{"rules":[2,3,6],"inclusive":false},"INITIAL":{"rules":[0,1,3,4,5,9,10,11,12,13,14,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38],"inclusive":true}}
 });
 return lexer;
 })();
diff --git a/src/diagrams/sequenceDiagram/sequenceDb.js b/src/diagrams/sequenceDiagram/sequenceDb.js
index 257d55c115..3734ef0e64 100644
--- a/src/diagrams/sequenceDiagram/sequenceDb.js
+++ b/src/diagrams/sequenceDiagram/sequenceDb.js
@@ -71,7 +71,10 @@ exports.LINETYPE = {
     OPT_START    : 15 ,
     OPT_END      : 16 ,
     ACTIVE_START : 17 ,
-    ACTIVE_END   : 18
+    ACTIVE_END   : 18 ,
+    PAR_START    : 19 ,
+    PAR_AND      : 20 ,
+    PAR_END      : 21
 };
 
 exports.ARROWTYPE = {
@@ -156,6 +159,16 @@ exports.apply = function(param){
                 break;
             case 'setTitle': 
                 exports.setTitle(param.text);
+                break;
+            case 'parStart':
+                exports.addSignal(undefined, undefined, param.parText, param.signalType);
+                break;
+            case 'and':
+                exports.addSignal(undefined, undefined, param.parText, param.signalType);
+                break;
+            case 'parEnd':
+                exports.addSignal(undefined, undefined, undefined, param.signalType);
+                break;
         }
     }
 };
diff --git a/src/diagrams/sequenceDiagram/sequenceDiagram.spec.js b/src/diagrams/sequenceDiagram/sequenceDiagram.spec.js
index b66644e537..302dbaa5b7 100644
--- a/src/diagrams/sequenceDiagram/sequenceDiagram.spec.js
+++ b/src/diagrams/sequenceDiagram/sequenceDiagram.spec.js
@@ -448,6 +448,32 @@ describe('when parsing a sequenceDiagram',function() {
         expect(messages[0].from).toBe('Alice');
         expect(messages[1].from).toBe('Bob');
     });
+    it('it should handle par statements a sequenceDiagram', function () {
+        var str = 'sequenceDiagram\n' +
+            'par Parallel one\n' +
+            'Alice->>Bob: Hello Bob, how are you?\n' +
+            'Bob-->>Alice: I am good thanks!\n' +
+            'and Parallel two\n' +
+            'Alice->>Bob: Are you OK?\n' +
+            'Bob-->>Alice: Fine!\n' +
+            'and Parallel three\n' +
+            'Alice->>Bob: What do you think about it?\n' +
+            'Bob-->>Alice: It\'s good!\n' +
+            'end';
+
+        sq.parse(str);
+        var actors = sq.yy.getActors();
+
+        expect(actors.Alice.description).toBe('Alice');
+        expect(actors.Bob.description).toBe('Bob');
+
+        var messages = sq.yy.getMessages();
+
+        expect(messages.length).toBe(10);
+        expect(messages[0].message).toBe('Parallel one');
+        expect(messages[1].from).toBe('Alice');
+        expect(messages[2].from).toBe('Bob');
+    });
     it('it should handle special characters in signals', function () {
         var str = 'sequenceDiagram\n' +
             'Alice->Bob: -:<>,;# comment';
@@ -506,6 +532,21 @@ describe('when parsing a sequenceDiagram',function() {
         expect(messages[1].message).toBe('-:<>,');
         expect(messages[3].message).toBe(',<>:-');
     });
+    it('it should handle special characters in par', function () {
+        var str = 'sequenceDiagram\n' +
+            'Alice->Bob: Hello Bob, how are you?\n' +
+            'par -:<>,;# comment\n' +
+            'Bob-->Alice: I am good thanks!\n' +
+            'and ,<>:-#; comment\n' +
+            'Bob-->Alice: I am good thanks!\n' +
+            'end';
+
+        sq.parse(str);
+
+        var messages = sq.yy.getMessages();
+        expect(messages[1].message).toBe('-:<>,');
+        expect(messages[3].message).toBe(',<>:-');
+    });
     it('it should handle no-label loop', function () {
         var str = 'sequenceDiagram\n' +
             'Alice->Bob: Hello Bob, how are you?\n' +
@@ -543,6 +584,23 @@ describe('when parsing a sequenceDiagram',function() {
 
         sq.parse(str);
 
+        var messages = sq.yy.getMessages();
+        expect(messages[1].message).toBe('');
+        expect(messages[2].message).toBe('I am good thanks!');
+        expect(messages[3].message).toBe('');
+        expect(messages[4].message).toBe('I am good thanks!');
+    });
+    it('it should handle no-label par', function () {
+        var str = 'sequenceDiagram\n' +
+            'Alice->Bob: Hello Bob, how are you?\n' +
+            'par;' +
+            'Bob-->Alice: I am good thanks!\n' +
+            'and # comment\n' +
+            'Bob-->Alice: I am good thanks!\n' +
+            'end';
+
+        sq.parse(str);
+
         var messages = sq.yy.getMessages();
         expect(messages[1].message).toBe('');
         expect(messages[2].message).toBe('I am good thanks!');
diff --git a/src/diagrams/sequenceDiagram/sequenceRenderer.js b/src/diagrams/sequenceDiagram/sequenceRenderer.js
index 0253412d96..a690d7e53f 100644
--- a/src/diagrams/sequenceDiagram/sequenceRenderer.js
+++ b/src/diagrams/sequenceDiagram/sequenceRenderer.js
@@ -134,10 +134,12 @@ exports.bounds = {
         var loop = this.sequenceItems.pop();
         return loop;
     },
-    addElseToLoop:function(message){
+    addSectionToLoop: function(message) {
         var loop = this.sequenceItems.pop();
-        loop.elsey =  exports.bounds.getVerticalPos();
-        loop.elseText = message;
+        loop.sections = loop.sections || [];
+        loop.sectionTitles = loop.sectionTitles || [];
+        loop.sections.push(exports.bounds.getVerticalPos());
+        loop.sectionTitles.push(message);
         this.sequenceItems.push(loop);
     },
     bumpVerticalPos:function(bump){
@@ -424,10 +426,8 @@ module.exports.draw = function (text, id) {
                 exports.bounds.bumpVerticalPos(conf.boxMargin + conf.boxTextMargin);
                 break;
             case sq.yy.LINETYPE.ALT_ELSE:
-
-                //exports.drawLoop(diagram, loopData);
                 exports.bounds.bumpVerticalPos(conf.boxMargin);
-                loopData = exports.bounds.addElseToLoop(msg.message);
+                loopData = exports.bounds.addSectionToLoop(msg.message);
                 exports.bounds.bumpVerticalPos(conf.boxMargin);
                 break;
             case sq.yy.LINETYPE.ALT_END:
@@ -436,6 +436,21 @@ module.exports.draw = function (text, id) {
                 svgDraw.drawLoop(diagram, loopData,'alt', conf);
                 exports.bounds.bumpVerticalPos(conf.boxMargin);
                 break;
+            case sq.yy.LINETYPE.PAR_START:
+                exports.bounds.bumpVerticalPos(conf.boxMargin);
+                exports.bounds.newLoop(msg.message);
+                exports.bounds.bumpVerticalPos(conf.boxMargin + conf.boxTextMargin);
+                break;
+            case sq.yy.LINETYPE.PAR_AND:
+                exports.bounds.bumpVerticalPos(conf.boxMargin);
+                loopData = exports.bounds.addSectionToLoop(msg.message);
+                exports.bounds.bumpVerticalPos(conf.boxMargin);
+                break;
+            case sq.yy.LINETYPE.PAR_END:
+                loopData = exports.bounds.endLoop();
+                svgDraw.drawLoop(diagram, loopData, 'par', conf);
+                exports.bounds.bumpVerticalPos(conf.boxMargin);
+                break;
             default:
               try {
                 lastMsg = msg;
diff --git a/src/diagrams/sequenceDiagram/svgDraw.js b/src/diagrams/sequenceDiagram/svgDraw.js
index cd0838cdbd..b5870d42fb 100644
--- a/src/diagrams/sequenceDiagram/svgDraw.js
+++ b/src/diagrams/sequenceDiagram/svgDraw.js
@@ -158,8 +158,10 @@ exports.drawLoop = function(elem,bounds,labelText, conf){
     drawLoopLine(bounds.stopx , bounds.starty, bounds.stopx , bounds.stopy );
     drawLoopLine(bounds.startx, bounds.stopy , bounds.stopx , bounds.stopy );
     drawLoopLine(bounds.startx, bounds.starty, bounds.startx, bounds.stopy );
-    if(typeof bounds.elsey !== 'undefined'){
-        drawLoopLine(bounds.startx, bounds.elsey, bounds.stopx, bounds.elsey).style('stroke-dasharray', '3, 3');
+    if (typeof bounds.sections !== 'undefined') {
+        bounds.sections.forEach(function(item) {
+            drawLoopLine(bounds.startx, item, bounds.stopx, item).style('stroke-dasharray', '3, 3');
+        });
     }
 
     var txt = exports.getTextObj();
@@ -181,10 +183,14 @@ exports.drawLoop = function(elem,bounds,labelText, conf){
 
     exports.drawText(g,txt);
 
-    if (typeof bounds.elseText !== 'undefined' && bounds.elseText !== "") {
-        txt.text = '[ ' + bounds.elseText + ' ]';
-        txt.y = bounds.elsey + 1.5 * conf.boxMargin;
-        exports.drawText(g, txt);
+    if (typeof bounds.sectionTitles !== 'undefined') {
+        bounds.sectionTitles.forEach(function(item, idx) {
+            if (item !== '') {
+                txt.text = '[ ' + item + ' ]';
+                txt.y = bounds.sections[idx] + 1.5 * conf.boxMargin;
+                exports.drawText(g, txt);
+            }
+        });
     }
 };
 
diff --git a/test/examples/seq.html b/test/examples/seq.html
index 683814e919..a4b6225adf 100644
--- a/test/examples/seq.html
+++ b/test/examples/seq.html
@@ -122,6 +122,21 @@ <h1>Bounding test & async message to self</h1>
         Alice->>John the Long: Yes... John, how are you?
         John the Long-->>Alice: Super!
     </div>
+
+    <h1>Parallel</h1>
+    <div class="mermaid">
+        sequenceDiagram
+        par Parallel one
+        Alice->>Bob: Hello Bob, how are you?
+        Bob-->>Alice: I am good thanks!
+        and Parallel two
+        Alice->>Bob: Are you OK?
+        Bob-->>Alice: Fine!
+        and Parallel three
+        Alice->>Bob: What do you think about it?
+        Bob-->>Alice: It's good!
+        end
+    </div>
     <br/>