diff --git a/src/components/Main/MainView/MessageInput/composables/usePostMessage.ts b/src/components/Main/MainView/MessageInput/composables/usePostMessage.ts
index 131d01259..626815557 100644
--- a/src/components/Main/MainView/MessageInput/composables/usePostMessage.ts
+++ b/src/components/Main/MainView/MessageInput/composables/usePostMessage.ts
@@ -1,6 +1,5 @@
 import type { ChannelId } from '/@/types/entity-ids'
 import apis, { buildFilePathForPost, formatResizeError } from '/@/lib/apis'
-import { replace as embedInternalLink } from '/@/lib/markdown/internalLinkEmbedder'
 import useChannelPath from '/@/composables/useChannelPath'
 import { computed, ref, unref } from 'vue'
 import { nullUuid } from '/@/lib/basic/uuid'
@@ -93,23 +92,10 @@ const usePostMessage = (
       bothChannelsMapInitialFetchPromise.value
     ])
 
-    const embededText = embedInternalLink(state.text, {
-      getUser: findUserByName,
-      getGroup: getUserGroupByName,
-      getChannel: path => {
-        try {
-          const id = channelPathToId(path.split('/'), channelTree.value)
-          return { id }
-        } catch {
-          return undefined
-        }
-      }
-    })
-
     const dummyFileUrls = state.attachments.map(() =>
       buildFilePathForPost(nullUuid)
     )
-    const dummyText = createContent(embededText, dummyFileUrls)
+    const dummyText = createContent(state.text, dummyFileUrls)
     if (countLength(dummyText) > MESSAGE_MAX_LENGTH) {
       addErrorToast('メッセージが長すぎます')
       return
@@ -124,7 +110,7 @@ const usePostMessage = (
       })
 
       await apis.postMessage(cId, {
-        content: createContent(embededText, fileUrls)
+        content: createContent(state.text, fileUrls)
       })
 
       clearState()
diff --git a/src/lib/markdown/internalLinkEmbedder.ts b/src/lib/markdown/internalLinkEmbedder.ts
deleted file mode 100644
index da2724194..000000000
--- a/src/lib/markdown/internalLinkEmbedder.ts
+++ /dev/null
@@ -1,168 +0,0 @@
-/**
- * https://github.com/traPtitech/traQ/blob/master/utils/message/replacer.goと同様
- */
-
-const mentionRegex = /:?[@＠]([^\s@＠]{0,31}[^\s@＠:])/g
-const userStartsRegex = /^[@＠]([a-zA-Z0-9_-]{1,32})/g
-const channelRegex = /[#＃]([a-zA-Z0-9_/-]+)/g
-
-const backQuote = '`'
-const dollar = '$'
-const defaultCodeTokenLength = 3
-
-export type ReplaceGetters = UserAndGroupGetters & ChannelGetter
-
-interface UserAndGroupGetters {
-  /**
-   * nameは大文字小文字を無視する
-   */
-  getUser: (userName: string) => Readonly<Entity> | undefined
-  /**
-   * nameは大文字小文字を無視する
-   */
-  getGroup: (groupName: string) => Readonly<Entity> | undefined
-}
-interface ChannelGetter {
-  /**
-   * nameは大文字小文字を無視する
-   */
-  getChannel: (channelPath: string) => Readonly<Entity> | undefined
-}
-
-export interface Entity {
-  id: string
-}
-
-/**
- * コードブロックとLaTeXブロック内でない箇所の内部リンク埋め込みを行う
- * replacer.goのReplaceと同様のコード
- */
-export const replace = (m: string, getters: Readonly<ReplaceGetters>) => {
-  let inCodeBlock = false
-  let inLatexBlock = false
-  let codeTokenLength = defaultCodeTokenLength
-
-  const lines = m.split('\n')
-  const newLines = lines.map(line => {
-    if (!inLatexBlock && line.startsWith('`'.repeat(codeTokenLength))) {
-      // `の数が一致するものと組み合うようにする
-      if (!inCodeBlock) {
-        codeTokenLength = countPrefix(line, backQuote)
-      } else {
-        codeTokenLength = defaultCodeTokenLength
-      }
-
-      inCodeBlock = !inCodeBlock
-    }
-    if (!inCodeBlock && line.startsWith('$$')) {
-      inLatexBlock = !inLatexBlock
-    }
-    if (inCodeBlock || inLatexBlock) {
-      return line
-    }
-    // 「```」のブロックでも「$$」ブロック内でもないときに置換
-
-    let newLine = ''
-    // 「`」「$」で囲まれていないところの始めの文字のindex
-    let noExpressionStartIndex = 0
-    const chs = [...line]
-    for (let i = 0; i < chs.length; i++) {
-      const ch = chs[i]
-      if (ch !== backQuote && ch !== dollar) {
-        continue
-      }
-
-      // 囲まれていない場所が終了したのでその箇所は置換する
-      newLine += replaceAll(
-        chs.slice(noExpressionStartIndex, i).join(''),
-        getters
-      )
-
-      if (ch === dollar) {
-        // 「`」は「$」よりも優先されるので
-        // 「$ ` $」のように「`」がペアの「$」より前にあるときは
-        // 「$」のペアとして処理しない
-        const backQuoteI = chs.indexOf(backQuote, i + 1)
-        const dollarI = chs.indexOf(dollar, i + 1)
-        if (backQuoteI !== -1 && dollarI !== -1 && backQuoteI < dollarI) {
-          newLine += ch
-          noExpressionStartIndex = i + 1
-          continue
-        }
-      }
-      const newI = chs.indexOf(ch, i + 1)
-      if (newI === -1) {
-        // 「$」/「`」のペアがないとき
-        newLine += ch
-        noExpressionStartIndex = i + 1
-        continue
-      }
-      newLine += chs.slice(i, newI).join('')
-      i = newI
-      noExpressionStartIndex = newI
-    }
-    // 最後のペア以降の置換
-    newLine += replaceAll(chs.slice(noExpressionStartIndex).join(''), getters)
-    return newLine
-  })
-  return newLines.join('\n')
-}
-
-const replaceAll = (m: string, getters: Readonly<ReplaceGetters>) => {
-  return replaceMention(replaceChannel(m, getters), getters)
-}
-
-const replaceMention = (m: string, getters: Readonly<UserAndGroupGetters>) => {
-  return m.replace(mentionRegex, s => {
-    // 始まりが:なものを除外
-    if (s.startsWith(':')) {
-      return s
-    }
-
-    // .slice(1)は先頭の@を消すため
-    // 小文字化はgetter内で行う
-    const name = s.slice(1)
-    const uid = getters.getUser(name)?.id
-    if (uid) {
-      return `!{"type":"user","raw":"${s}","id":"${uid}"}`
-    }
-    const gid = getters.getGroup(name)?.id
-    if (gid) {
-      return `!{"type":"group","raw":"${s}","id":"${gid}"}`
-    }
-
-    return s.replace(userStartsRegex, s => {
-      // .slice(1)は先頭の@を消すため
-      // 小文字化はgetter内で行う
-      const name = s.slice(1)
-
-      const uid = getters.getUser(name)?.id
-      if (uid) {
-        return `!{"type":"user","raw":"${s}","id":"${uid}"}`
-      }
-      return s
-    })
-  })
-}
-
-const replaceChannel = (m: string, getter: Readonly<ChannelGetter>) => {
-  return m.replace(channelRegex, s => {
-    // .slice(1)は先頭の#を消すため
-    // 小文字化はgetter内で行う
-    const t = s.slice(1)
-    const cid = getter.getChannel(t)?.id
-    if (cid) {
-      return `!{"type":"channel","raw":"${s}","id":"${cid}"}`
-    }
-    return s
-  })
-}
-
-const countPrefix = (line: string, letter: string) => {
-  let count = 0
-  for (const ch of line) {
-    if (ch !== letter) break
-    count++
-  }
-  return count
-}
diff --git a/tests/unit/lib/markdown/internalLinkEmbedder.spec.ts b/tests/unit/lib/markdown/internalLinkEmbedder.spec.ts
deleted file mode 100644
index 5eca18a4f..000000000
--- a/tests/unit/lib/markdown/internalLinkEmbedder.spec.ts
+++ /dev/null
@@ -1,124 +0,0 @@
-import type {
-  ReplaceGetters,
-  Entity
-} from '/@/lib/markdown/internalLinkEmbedder'
-import { replace } from '/@/lib/markdown/internalLinkEmbedder'
-
-const users = {
-  'dfdff0c9-5de0-46ee-9721-2525e8bb3d44': {
-    name: 'a',
-    id: 'dfdff0c9-5de0-46ee-9721-2525e8bb3d44'
-  },
-  'dfdff0c9-5de0-46ee-9721-2525e8bb3d45': {
-    name: 'takashi_trap',
-    id: 'dfdff0c9-5de0-46ee-9721-2525e8bb3d45'
-  },
-  'dfdff0c9-5de0-46ee-9721-2525e8bb3d46': {
-    name: 'takashi_trape',
-    id: 'dfdff0c9-5de0-46ee-9721-2525e8bb3d46'
-  },
-  'dfdff0c9-5de0-46ee-9721-2525e8bb3d47': {
-    name: 'very_long_long_long_long_lo_name',
-    id: 'dfdff0c9-5de0-46ee-9721-2525e8bb3d47'
-  }
-}
-const groups = {
-  'dfabf0c9-5de0-46ee-9721-2525e8bb3d45': {
-    name: 'okあok',
-    id: 'dfabf0c9-5de0-46ee-9721-2525e8bb3d45'
-  },
-  'dfabf0c9-5de0-46ee-9721-2525e8bb3d46': {
-    name: 'takashi_trapo',
-    id: 'dfabf0c9-5de0-46ee-9721-2525e8bb3d46'
-  }
-}
-const channels = {
-  'ea452867-553b-4808-a14f-a47ee0009ee6': {
-    name: 'a',
-    id: 'ea452867-553b-4808-a14f-a47ee0009ee6'
-  }
-}
-
-interface EntityWithName extends Entity {
-  name: string
-}
-
-const createFindFunc =
-  (store: Record<string, EntityWithName>) =>
-  (name: string): EntityWithName | undefined =>
-    Object.values(store).find(e => e.name.toLowerCase() === name.toLowerCase())
-
-const testStore: ReplaceGetters = {
-  getUser: createFindFunc(users),
-  getGroup: createFindFunc(groups),
-  getChannel: createFindFunc(channels)
-}
-
-/**
- * 置換前, 置換後
- */
-type Spec = [string, string]
-
-const specs: Spec[] = [
-  [
-    'aaaa#aeee `#a` @takashi_trapa @takashi_trap @#a\n```\n#a @takashi_trap\n```\n@okあok',
-    'aaaa#aeee `#a` @takashi_trapa !{"type":"user","raw":"@takashi_trap","id":"dfdff0c9-5de0-46ee-9721-2525e8bb3d45"} @!{"type":"channel","raw":"#a","id":"ea452867-553b-4808-a14f-a47ee0009ee6"}\n```\n#a @takashi_trap\n```\n!{"type":"group","raw":"@okあok","id":"dfabf0c9-5de0-46ee-9721-2525e8bb3d45"}'
-  ],
-  ['$$\\text{@takashi_trap}$$', '$$\\text{@takashi_trap}$$'],
-  ['$$\n```\n@takashi_trap\n```\n$$', '$$\n```\n@takashi_trap\n```\n$$'],
-  [
-    '`$@takashi_trap$` @takashi_trap @very_long_long_long_long_lo_name',
-    '`$@takashi_trap$` !{"type":"user","raw":"@takashi_trap","id":"dfdff0c9-5de0-46ee-9721-2525e8bb3d45"} !{"type":"user","raw":"@very_long_long_long_long_lo_name","id":"dfdff0c9-5de0-46ee-9721-2525e8bb3d47"}'
-  ],
-  [
-    '`@takashi_trap` $@takashi_trap$ $$ $ `$@takashi_trap$$@takashi_trap$`$@takashi_trap$`$`',
-    '`@takashi_trap` $@takashi_trap$ $$ $ `$@takashi_trap$$@takashi_trap$`$@takashi_trap$`$`'
-  ],
-  [
-    '`$@takashi_trap$` $@takashi_trap$ `@takashi_trap`',
-    '`$@takashi_trap$` $@takashi_trap$ `@takashi_trap`'
-  ],
-  ['`okあok`', '`okあok`'],
-  ['$okあok$', '$okあok$'],
-  ['`$okあok$`', '`$okあok$`'],
-  [
-    '````\n```\n@takashi_trap\n```\n````\n\n```\n@takashi_trap\n```',
-    '````\n```\n@takashi_trap\n```\n````\n\n```\n@takashi_trap\n```'
-  ],
-  [
-    '@takashi_trapああ a@takashi_trap',
-    '!{"type":"user","raw":"@takashi_trap","id":"dfdff0c9-5de0-46ee-9721-2525e8bb3d45"}ああ a!{"type":"user","raw":"@takashi_trap","id":"dfdff0c9-5de0-46ee-9721-2525e8bb3d45"}'
-  ],
-  [
-    ':@takashi_trap:ああ a@takashi_trap',
-    ':@takashi_trap:ああ a!{"type":"user","raw":"@takashi_trap","id":"dfdff0c9-5de0-46ee-9721-2525e8bb3d45"}'
-  ],
-  [
-    '@takashi_trapああ:',
-    '!{"type":"user","raw":"@takashi_trap","id":"dfdff0c9-5de0-46ee-9721-2525e8bb3d45"}ああ:'
-  ],
-  [
-    '@takashi_trap:@takashi_trap: :@takashi_trap: :takashi_trap',
-    '!{"type":"user","raw":"@takashi_trap","id":"dfdff0c9-5de0-46ee-9721-2525e8bb3d45"}:@takashi_trap: :@takashi_trap: :takashi_trap'
-  ],
-  [
-    '@takashi_trapo @takashi_trape',
-    '!{"type":"group","raw":"@takashi_trapo","id":"dfabf0c9-5de0-46ee-9721-2525e8bb3d46"} !{"type":"user","raw":"@takashi_trape","id":"dfdff0c9-5de0-46ee-9721-2525e8bb3d46"}'
-  ],
-  [
-    '@)、(@takashi_trap @takashi_trap)',
-    '@)、(!{"type":"user","raw":"@takashi_trap","id":"dfdff0c9-5de0-46ee-9721-2525e8bb3d45"} !{"type":"user","raw":"@takashi_trap","id":"dfdff0c9-5de0-46ee-9721-2525e8bb3d45"})'
-  ],
-  [
-    '@a',
-    '!{"type":"user","raw":"@a","id":"dfdff0c9-5de0-46ee-9721-2525e8bb3d44"}'
-  ]
-]
-
-describe('internalLinkEmbedder', () => {
-  specs.forEach(([before, after], i) => {
-    it(`can embed internal links ${i}`, () => {
-      expect(replace(before, testStore)).toEqual(after)
-    })
-  })
-})