diff --git a/src/main/database.ts b/src/main/database.ts
index 0d82b6d485..ad8976b9d3 100644
--- a/src/main/database.ts
+++ b/src/main/database.ts
@@ -36,6 +36,18 @@ FOREIGN KEY (account_id) REFERENCES accounts(id) ON DELETE CASCADE)',
         }
       }
     )
+    db.run(
+      'CREATE TABLE IF NOT EXISTS hashtags(\
+id INTEGER PRIMARY KEY, \
+tag TEXT NOT NULL, \
+account_id INTEGER UNIQUE NOT NULL, \
+FOREIGN KEY (account_id) REFERENCES accounts(id) ON DELETE CASCADE)',
+      err => {
+        if (err) {
+          console.error('failed to create hashtags: ', err)
+        }
+      }
+    )
   })
 
   return db
diff --git a/src/main/hashtags.ts b/src/main/hashtags.ts
index 38e607902b..6d4b96fd78 100644
--- a/src/main/hashtags.ts
+++ b/src/main/hashtags.ts
@@ -1,44 +1,63 @@
-import Datastore from 'nedb'
+import sqlite3 from 'sqlite3'
 import { LocalTag } from '~/src/types/localTag'
 
-export default class Hashtags {
-  private db: Datastore
+export const listTags = (db: sqlite3.Database, accountId: number): Promise<Array<LocalTag>> => {
+  return new Promise((resolve, reject) => {
+    db.all('SELECT * FROM hashtags WHERE account_id = ?', accountId, (err, rows) => {
+      if (err) {
+        reject(err)
+      }
+      resolve(
+        rows.map(r => ({
+          id: r.id,
+          tagName: r.tag,
+          accountId: r.account_id
+        }))
+      )
+    })
+  })
+}
 
-  constructor(db: Datastore) {
-    this.db = db
-    this.db.ensureIndex({ fieldName: 'tagName', unique: true }, _ => {})
-  }
+export const insertTag = (db: sqlite3.Database, accountId: number, tag: string): Promise<LocalTag> => {
+  return new Promise((resolve, reject) => {
+    db.serialize(() => {
+      db.run('BEGIN TRANSACTION')
 
-  listTags(): Promise<Array<LocalTag>> {
-    return new Promise((resolve, reject) => {
-      this.db.find<LocalTag>({}, (err, docs) => {
-        if (err) return reject(err)
-        resolve(docs)
-      })
-    })
-  }
+      db.get('SELECT * FROM hashtags WHERE id = ? AND tag = ?', [accountId, tag], (err, row) => {
+        if (err) {
+          reject(err)
+        }
+        if (row) {
+          resolve({
+            id: row.id,
+            tagName: row.tag,
+            accountId: row.account_id
+          })
+        }
 
-  insertTag(tag: string): Promise<LocalTag> {
-    return new Promise((resolve, reject) => {
-      this.db.insert({ tagName: tag }, (err, doc) => {
-        if (err) return reject(err)
-        resolve(doc)
+        db.run('INSERT INTO hashtags(tag, account_id) VALUES (?, ?)', [accountId, tag], function (err) {
+          if (err) {
+            reject(err)
+          }
+          db.run('COMMIT')
+          resolve({
+            id: this.lastID,
+            tagName: tag,
+            accountId: accountId
+          })
+        })
       })
     })
-  }
+  })
+}
 
-  removeTag(localTag: LocalTag): Promise<number> {
-    return new Promise((resolve, reject) => {
-      this.db.remove(
-        {
-          tagName: localTag.tagName
-        },
-        { multi: true },
-        (err, numRemoved) => {
-          if (err) return reject(err)
-          resolve(numRemoved)
-        }
-      )
+export const removeTag = (db: sqlite3.Database, tag: LocalTag): Promise<null> => {
+  return new Promise((resolve, reject) => {
+    db.run('DELETE FROM hashtags WHERE id = ?', tag.id, err => {
+      if (err) {
+        reject(err)
+      }
+      resolve(null)
     })
-  }
+  })
 }
diff --git a/src/main/index.ts b/src/main/index.ts
index 7b7e3a6979..25bf0fbfe9 100644
--- a/src/main/index.ts
+++ b/src/main/index.ts
@@ -35,7 +35,6 @@ import { getAccount, insertAccount, listAccounts } from './account'
 // import { StreamingURL, UserStreaming, DirectStreaming, LocalStreaming, PublicStreaming, ListStreaming, TagStreaming } from './websocket'
 import Preferences from './preferences'
 import Fonts from './fonts'
-import Hashtags from './hashtags'
 import i18next from '~/src/config/i18n'
 import { i18n as I18n } from 'i18next'
 import Language, { LanguageType } from '../constants/language'
@@ -54,6 +53,7 @@ import Settings from './settings'
 import { BaseSettings, Setting } from '~/src/types/setting'
 import { insertServer } from './server'
 import { LocalServer } from '~src/types/localServer'
+import { insertTag, listTags, removeTag } from './hashtags'
 
 /**
  * Context menu
@@ -125,12 +125,6 @@ const db = newDB(databasePath)
 
 const preferencesDBPath = process.env.NODE_ENV === 'production' ? userData + './db/preferences.json' : 'preferences.json'
 
-const hashtagsDBPath = process.env.NODE_ENV === 'production' ? userData + '/db/hashtags.db' : 'hashtags.db'
-const hashtagsDB = new Datastore({
-  filename: hashtagsDBPath,
-  autoload: true
-})
-
 const settingsDBPath = process.env.NODE_ENV === 'production' ? userData + './db/settings.json' : 'settings.json'
 
 /**
@@ -1113,20 +1107,17 @@ ipcMain.handle('update-spellchecker-languages', async (_: IpcMainInvokeEvent, la
 })
 
 // hashtag
-ipcMain.handle('save-hashtag', async (_: IpcMainInvokeEvent, tag: string) => {
-  const hashtags = new Hashtags(hashtagsDB)
-  await hashtags.insertTag(tag)
+ipcMain.handle('save-hashtag', async (_: IpcMainInvokeEvent, req: { accountId: number; tag: string }) => {
+  await insertTag(db, req.accountId, req.tag)
 })
 
-ipcMain.handle('list-hashtags', async (_: IpcMainInvokeEvent) => {
-  const hashtags = new Hashtags(hashtagsDB)
-  const tags = await hashtags.listTags()
+ipcMain.handle('list-hashtags', async (_: IpcMainInvokeEvent, accountId: number) => {
+  const tags = await listTags(db, accountId)
   return tags
 })
 
 ipcMain.handle('remove-hashtag', async (_: IpcMainInvokeEvent, tag: LocalTag) => {
-  const hashtags = new Hashtags(hashtagsDB)
-  await hashtags.removeTag(tag)
+  await removeTag(db, tag)
 })
 
 // Fonts
diff --git a/src/renderer/store/TimelineSpace/Contents/Hashtag.ts b/src/renderer/store/TimelineSpace/Contents/Hashtag.ts
index f62fe8a2a4..865192866f 100644
--- a/src/renderer/store/TimelineSpace/Contents/Hashtag.ts
+++ b/src/renderer/store/TimelineSpace/Contents/Hashtag.ts
@@ -18,8 +18,8 @@ export type HashtagModuleState = HashtagModule & HashtagState
 const state = (): HashtagState => ({})
 
 const actions: ActionTree<HashtagState, RootState> = {
-  saveTag: async ({ dispatch }, tag: string) => {
-    await win.ipcRenderer.invoke('save-hashtag', tag)
+  saveTag: async ({ dispatch, rootState }, tag: string) => {
+    await win.ipcRenderer.invoke('save-hashtag', { accountId: rootState.TimelineSpace.account!.id, tag })
     dispatch('TimelineSpace/SideMenu/listTags', {}, { root: true })
   }
 }
diff --git a/src/renderer/store/TimelineSpace/Contents/Hashtag/List.ts b/src/renderer/store/TimelineSpace/Contents/Hashtag/List.ts
index 0d265a8639..f20658f9e8 100644
--- a/src/renderer/store/TimelineSpace/Contents/Hashtag/List.ts
+++ b/src/renderer/store/TimelineSpace/Contents/Hashtag/List.ts
@@ -4,7 +4,7 @@ import { RootState } from '@/store'
 import { MyWindow } from '~/src/types/global'
 import { toRaw } from 'vue'
 
-const win = window as any as MyWindow
+const win = (window as any) as MyWindow
 
 export type ListState = {
   tags: Array<LocalTag>
@@ -30,14 +30,14 @@ export const ACTION_TYPES = {
 }
 
 const actions: ActionTree<ListState, RootState> = {
-  [ACTION_TYPES.LIST_TAGS]: async ({ commit }) => {
-    const tags: Array<LocalTag> = await win.ipcRenderer.invoke('list-hashtags')
+  [ACTION_TYPES.LIST_TAGS]: async ({ rootState, commit }) => {
+    const tags: Array<LocalTag> = await win.ipcRenderer.invoke('list-hashtags', rootState.TimelineSpace.account!.id)
     commit(MUTATION_TYPES.UPDATE_TAGS, tags)
     return tags
   },
   [ACTION_TYPES.REMOVE_TAG]: async ({ dispatch }, tag: LocalTag) => {
     await win.ipcRenderer.invoke('remove-hashtag', toRaw(tag))
-    dispatch('listTags')
+    dispatch(ACTION_TYPES.LIST_TAGS)
     dispatch('TimelineSpace/SideMenu/listTags', {}, { root: true })
     return 'deleted'
   }
diff --git a/src/renderer/store/TimelineSpace/SideMenu.ts b/src/renderer/store/TimelineSpace/SideMenu.ts
index c3e4f90469..9a24e415dc 100644
--- a/src/renderer/store/TimelineSpace/SideMenu.ts
+++ b/src/renderer/store/TimelineSpace/SideMenu.ts
@@ -223,8 +223,10 @@ const actions: ActionTree<SideMenuState, RootState> = {
     commit(MUTATION_TYPES.CHANGE_COLLAPSE, value)
     return value
   },
-  [ACTION_TYPES.LIST_TAGS]: async ({ commit }) => {
-    const tags: Array<LocalTag> = await win.ipcRenderer.invoke('list-hashtags')
+  [ACTION_TYPES.LIST_TAGS]: async ({ rootState, commit }) => {
+    // TODO: Can not get account because too early.
+    // It should be executed after TimelineSpace obtain local account.
+    const tags: Array<LocalTag> = await win.ipcRenderer.invoke('list-hashtags', rootState.TimelineSpace.account!.id)
     commit(MUTATION_TYPES.UPDATE_TAGS, tags)
     return tags
   }
diff --git a/src/types/localTag.ts b/src/types/localTag.ts
index 8c916fdd1e..c9870113ff 100644
--- a/src/types/localTag.ts
+++ b/src/types/localTag.ts
@@ -1,4 +1,5 @@
 export type LocalTag = {
+  id: number
   tagName: string
-  _id?: string
+  accountId: number
 }