diff --git a/src/store/app/rtc.ts b/src/store/app/rtc.ts
index e6bf4b053..2a5302e0c 100644
--- a/src/store/app/rtc.ts
+++ b/src/store/app/rtc.ts
@@ -46,16 +46,15 @@ const useAppRtcPinia = defineStore('app/rtc', () => {
   }
 
   /** マイクミュート */
-  const isMicMuted = ref(false)
   const muteLocalStream = () => {
     if (!localStreamManager.value) return
     localStreamManager.value.mute()
-    isMicMuted.value = true
+    rtcSettings.isMute.value = true
   }
   const unmuteLocalStream = () => {
     if (!localStreamManager.value) return
     localStreamManager.value.unmute()
-    isMicMuted.value = false
+    rtcSettings.isMute.value = false
   }
 
   /** 現在発話しているユーザーを判定するsetIntervalのID */
@@ -283,7 +282,7 @@ const useAppRtcPinia = defineStore('app/rtc', () => {
       setUserVolume(userId, 0.5)
     })
 
-    if (isMicMuted.value) {
+    if (rtcSettings.isMute.value) {
       mute()
     } else {
       unmute()
@@ -352,7 +351,7 @@ const useAppRtcPinia = defineStore('app/rtc', () => {
 
   return {
     isCurrentDevice,
-    isMicMuted,
+    isMicMuted: rtcSettings.isMute,
     talkingUsersState,
     startQall,
     endQall,
diff --git a/src/store/app/rtcSettings.ts b/src/store/app/rtcSettings.ts
index 0b1d7cca4..ced6a3227 100644
--- a/src/store/app/rtcSettings.ts
+++ b/src/store/app/rtcSettings.ts
@@ -19,6 +19,7 @@ type State = {
   voicePitch: number
   voiceRate: number
   voiceVolume: number
+  isMute: boolean
 }
 
 const useRtcSettingsPinia = defineStore('app/rtcSettings', () => {
@@ -33,12 +34,13 @@ const useRtcSettingsPinia = defineStore('app/rtcSettings', () => {
     voiceName: '',
     voicePitch: 1,
     voiceRate: 1.2,
-    voiceVolume: 1
+    voiceVolume: 1,
+    isMute: false
   }
 
   const [state, restoring, restoringPromise] = useIndexedDbValue(
     'store/app/rtcSettings',
-    2,
+    3,
     {
       // migrate from vuex
       1: async getStore => {
@@ -64,6 +66,12 @@ const useRtcSettingsPinia = defineStore('app/rtcSettings', () => {
         delete state?.isNoiseReductionEnabled
         const setReq = store.put(state, key)
         await promisifyRequest(setReq)
+      },
+
+      3: async getStore => {
+        const store = getStore()
+        const setReq = store.put({ isMute: false }, key)
+        await promisifyRequest(setReq)
       }
     },
     initialValue