diff --git a/src/error/error.rs b/src/error/error.rs
index 4f7811b..a54ed2d 100644
--- a/src/error/error.rs
+++ b/src/error/error.rs
@@ -80,7 +80,8 @@ impl Error {
                     | ParseError::UndefinedVariable(loc)
                     | ParseError::UnusedVariable(loc)
                     | ParseError::NotMatchReturnType(loc)
-                    | ParseError::UnexpectedUnderScoreOperator(loc) => loc.clone(),
+                    | ParseError::UnexpectedUnderScoreOperator(loc)
+                    | ParseError::NotMatchTypeAnotherOneOfStatement(loc) => loc.clone(),
                     ParseError::Eof => Loc::new(input.len() as u8, input.len() as u8 + 1),
                 };
                 (e, loc)
diff --git a/src/fmt/fmt.rs b/src/fmt/fmt.rs
index 4b9b3a7..4ee2073 100644
--- a/src/fmt/fmt.rs
+++ b/src/fmt/fmt.rs
@@ -111,6 +111,12 @@ impl fmt::Display for ParseError {
                 "{}: Expected under socre as void return, but used as operator.",
                 loc
             ),
+            ParseError::NotMatchTypeAnotherOneOfStatement(loc) => write!(
+                f,
+                "{}: Expected match return type of each statement but not match.",
+                loc
+            ),
+
             ParseError::Eof => write!(f, "Expected token, but not detected."),
         }
     }
diff --git a/src/node/node.rs b/src/node/node.rs
index 7a3f050..d0df3d4 100644
--- a/src/node/node.rs
+++ b/src/node/node.rs
@@ -188,4 +188,28 @@ impl NodeSt {
             _ => unimplemented!(),
         }
     }
+
+    pub fn isi(self) -> bool {
+        match self.c.value {
+            NodeKind::Num(_)
+            | NodeKind::Add
+            | NodeKind::Sub
+            | NodeKind::Mul
+            | NodeKind::Div
+            | NodeKind::E
+            | NodeKind::NE
+            | NodeKind::L
+            | NodeKind::LE
+            | NodeKind::G
+            | NodeKind::GE
+            | NodeKind::NewAssignG
+            | NodeKind::NewAssignL
+            | NodeKind::NewAssign
+            | NodeKind::Assign
+            | NodeKind::Ident(_)
+            | NodeKind::GVar(_)
+            | NodeKind::LVar(_) => true,
+            _ => false,
+        }
+    }
 }
diff --git a/src/node_arr/node_arr.rs b/src/node_arr/node_arr.rs
index 468571e..3118c4e 100644
--- a/src/node_arr/node_arr.rs
+++ b/src/node_arr/node_arr.rs
@@ -154,27 +154,19 @@ impl NodeArr {
         it: &mut TokenIter,
         ev: Vec<Vec<Var>>,
     ) -> Result<(Self, Vec<String>), ParseError> {
-        let mut a = Self::new();
-        a.set_env(ev);
-
         expect_token(
             TokenKind::LBrace,
             ParseError::NotOpenedStmt(it.p.peek().unwrap().to_owned().to_owned()),
             it,
         )?;
 
-        while it.peek_value() != TokenKind::RBrace {
-            match NodeSt::parser(it)? {
-                n => match n.c.value {
-                    _ => {
-                        a.set_imm_env();
-                        let n = beta(&mut n.to_owned(), &mut a);
-                        a.node_st_vec.push(n.to_owned());
-                    }
-                },
-            }
-        }
-        it.p.next().unwrap();
+        let (a, _) = Self::stp(it, ev)?;
+
+        expect_token(
+            TokenKind::RBrace,
+            ParseError::NotOpenedStmt(it.p.peek().unwrap().to_owned().to_owned()),
+            it,
+        )?;
 
         Ok((a, vec![]))
     }
@@ -352,8 +344,7 @@ impl NodeArr {
                                 let mut c = beta(&mut n.to_owned().cond.unwrap(), &mut a);
                                 c = c.simplified();
 
-                                let if_stmts_a =
-                                    Self::parse_statement(it, a.imm_env_v.to_owned())?.0;
+                                let if_stmts = Self::parse_statement(it, a.imm_env_v.to_owned())?.0;
 
                                 let mut _else_if_stmts: NodeArr = NodeArr::new();
                                 match it.p.peek().unwrap().value {
@@ -365,6 +356,15 @@ impl NodeArr {
                                     _ => (),
                                 };
 
+                                let if_stmts_isi = NodeSt::isi(if_stmts.ret_node_st);
+                                let else_if_stmts_isi = NodeSt::isi(_else_if_stmts.ret_node_st);
+
+                                if if_stmts_isi != else_if_stmts_isi {
+                                    return Err(ParseError::NotMatchTypeAnotherOneOfStatement(
+                                        it.p.peek().unwrap().loc.to_owned(),
+                                    ));
+                                }
+
                                 match c.c.value {
                                     NodeKind::Num(num) => {
                                         if num == 0 {
@@ -377,8 +377,7 @@ impl NodeArr {
                                             }
                                         }
 
-                                        a.node_st_vec
-                                            .append(&mut if_stmts_a.node_st_vec.to_owned());
+                                        a.node_st_vec.append(&mut if_stmts.node_st_vec.to_owned());
                                     }
                                     _ => {
                                         a.set_imm_env();
diff --git a/src/parser/error.rs b/src/parser/error.rs
index e1ecd4e..63b22da 100644
--- a/src/parser/error.rs
+++ b/src/parser/error.rs
@@ -22,6 +22,7 @@ pub enum ParseError {
     UnusedVariable(Loc),
     NotMatchReturnType(Loc),
     UnexpectedUnderScoreOperator(Loc),
+    NotMatchTypeAnotherOneOfStatement(Loc),
     // UnexpectedToken(Token),
     // NotExpression(Token),
     // UnclosedOpenParen(Token),
diff --git a/src/tests/parser/tests.rs b/src/tests/parser/tests.rs
index dd73a44..7fab279 100644
--- a/src/tests/parser/tests.rs
+++ b/src/tests/parser/tests.rs
@@ -269,3 +269,64 @@ fn unexpected_under_score_operator_test() {
     };
     assert!(n)
 }
+
+#[test]
+fn type_match_another_one_of_statement_1_test() {
+    let mut t = Token::tokenize("fn { int i = 9; if (i) { i; _ } else { 3*4; _ } _ }").unwrap();
+    let mut it = TokenIter::new(&mut t);
+    let n = match NodeArr::w_parser(&mut it, vec![]) {
+        Ok(_) => true,
+        Err(_) => false,
+    };
+    assert!(n)
+}
+
+// #[test]
+// fn type_match_another_one_of_statement_2_test() {
+//     let mut t = Token::tokenize("fn { int i = 9; if (i) { i; 0; } else { 3*4; _ } _ }").unwrap();
+//     let mut it = TokenIter::new(&mut t);
+//     let n = match NodeArr::w_parser(&mut it, vec![]) {
+//         Ok(_) => true,
+//         Err(_) => false
+//     };
+//     assert!(n)
+// }
+
+#[test]
+fn type_match_another_one_of_statement_3_test() {
+    let mut t = Token::tokenize("fn { int i = 9; if (i) { i; 0 } else { 3*4; 3 } _ }").unwrap();
+    let mut it = TokenIter::new(&mut t);
+    let n = match NodeArr::w_parser(&mut it, vec![]) {
+        Ok(_) => true,
+        Err(_) => false,
+    };
+    assert!(n)
+}
+
+#[test]
+fn type_not_match_another_one_of_statement_1_test() {
+    let mut t = Token::tokenize("fn { int i = 9; if (i) { i; _ } else { 3*4; 2; } _ }").unwrap();
+    let mut it = TokenIter::new(&mut t);
+    let n = match NodeArr::w_parser(&mut it, vec![]) {
+        Ok(_) => false,
+        Err(e) => match e {
+            ParseError::NotMatchTypeAnotherOneOfStatement(_) => true,
+            _ => false,
+        },
+    };
+    assert!(n)
+}
+
+// #[test]
+// fn type_not_match_another_one_of_statement_2_test() {
+//     let mut t = Token::tokenize("fn { int i = 9; if (i) { i; 0 } else { 3*4; 2; } _ }").unwrap();
+//     let mut it = TokenIter::new(&mut t);
+//     let n = match NodeArr::w_parser(&mut it, vec![]) {
+//         Ok(_) => false,
+//         Err(e) => match e {
+//             ParseError::NotMatchTypeAnotherOneOfStatement(_) => true,
+//             _ => false,
+//         },
+//     };
+//     assert!(n)
+// }
diff --git a/test.sh b/test.sh
index 2da7bff..54c47ca 100644
--- a/test.sh
+++ b/test.sh
@@ -158,7 +158,8 @@ assert_llvm 34 'fn int { int _u = 8; int a = 2; 4+2*a*_u-2 }'
 assert_llvm 1 'fn int { int i = 1; if (i) { 0 } else { 0 } i }'
 assert_llvm 0 'fn { if (2 == 3) { 1; 2; } else { 3; 4; } _ }'
 assert_llvm 0 'fn { int i = 9; if (i) { 1; 2; } else { 3*4; 5; } _ }'
-assert_llvm 0 'fn { int i = 9; if (i) { i; 2; } else { 3*4; 5; } _ }'
+assert_llvm 0 'fn { int i = 9; if (i) { i; 2 } else { 3*4; 5 } _ }'
+assert_llvm 0 'fn { int i = 9; if (i) { i; _ } else { 3*4; _ } _ }'
 
 echo "------------------------------"
 echo "All llvm test passed!\n"