diff --git a/app/javascript/check-stamp.js b/app/javascript/check-stamp.js
index b2074796239..c3ea8dcaaa2 100644
--- a/app/javascript/check-stamp.js
+++ b/app/javascript/check-stamp.js
@@ -1,5 +1,3 @@
-import Vue from 'vue'
-import CheckStamp from 'check-stamp.vue'
 import store from 'check-store.js'
 import CSRF from 'csrf'
 import 'whatwg-fetch'
diff --git a/app/javascript/check-stamp.vue b/app/javascript/check-stamp.vue
deleted file mode 100644
index 4651da78f14..00000000000
--- a/app/javascript/check-stamp.vue
+++ /dev/null
@@ -1,37 +0,0 @@
-<template lang="pug">
-.stamp.stamp-approve(v-if='checkId')
-  h2.stamp__content.is-title
-    | 確認済
-  time.stamp__content.is-created-at
-    | {{ checkCreatedAt }}
-  .stamp__content.is-user-name
-    .stamp__content-inner
-      | {{ checkUserName }}
-</template>
-<script>
-import 'whatwg-fetch'
-
-export default {
-  props: {
-    checkableId: { type: String, required: true },
-    checkableType: { type: String, required: true }
-  },
-  computed: {
-    checkId() {
-      return this.$store.getters.checkId
-    },
-    checkCreatedAt() {
-      return this.$store.getters.createdAt
-    },
-    checkUserName() {
-      return this.$store.getters.userName
-    }
-  },
-  mounted() {
-    this.$store.dispatch('setCheckable', {
-      checkableId: this.checkableId,
-      checkableType: this.checkableType
-    })
-  }
-}
-</script>
diff --git a/app/javascript/check-store.js b/app/javascript/check-store.js
index 56704b345bf..b9eb66797f9 100644
--- a/app/javascript/check-store.js
+++ b/app/javascript/check-store.js
@@ -7,8 +7,6 @@ Vue.use(Vuex)
 export default new Vuex.Store({
   state: {
     checkId: null,
-    userName: null,
-    createdAt: null,
     checkableId: null,
     checkableType: null,
     productId: null,
@@ -17,8 +15,6 @@ export default new Vuex.Store({
   },
   getters: {
     checkId: (state) => state.checkId,
-    userName: (state) => state.userName,
-    createdAt: (state) => state.createdAt,
     checkableId: (state) => state.checkableId,
     checkableType: (state) => state.checkableType,
     productId: (state) => state.productId,
@@ -26,13 +22,8 @@ export default new Vuex.Store({
     watchId: (state) => state.watchId
   },
   mutations: {
-    setCheckable(
-      state,
-      { checkId, userName, createdAt, checkableId, checkableType }
-    ) {
+    setCheckable(state, { checkId, checkableId, checkableType }) {
       state.checkId = checkId
-      state.userName = userName
-      state.createdAt = createdAt
       state.checkableId = checkableId
       state.checkableType = checkableType
     },
@@ -64,16 +55,12 @@ export default new Vuex.Store({
           if (json[0]) {
             commit('setCheckable', {
               checkId: json[0].id,
-              createdAt: json[0].created_at,
-              userName: json[0].user.login_name,
               checkableId: checkableId,
               checkableType: checkableType
             })
           } else {
             commit('setCheckable', {
               checkId: null,
-              createdAt: null,
-              userName: null,
               checkableId: checkableId,
               checkableType: checkableType
             })