diff --git a/packages/frontend/src/pages/channel.vue b/packages/frontend/src/pages/channel.vue
index 5949b50040..7eac42fa6d 100644
--- a/packages/frontend/src/pages/channel.vue
+++ b/packages/frontend/src/pages/channel.vue
@@ -38,7 +38,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<!-- スマホ・タブレットの場合、キーボードが表示されると投稿が見づらくなるので、デスクトップ場合のみ自動でフォーカスを当てる -->
 			<MkPostForm v-if="$i && defaultStore.reactiveState.showFixedPostFormInChannel.value" :channel="channel" class="post-form _panel" fixed :autofocus="deviceKind === 'desktop'"/>
 
-			<MkTimeline :key="channelId" src="channel" :channel="channelId" @before="before" @after="after"/>
+			<MkTimeline :key="channelId" src="channel" :channel="channelId" @before="before" @after="after" @note="miLocalStorage.setItemAsJson(`channelLastReadedAt:${channel.id}`, Date.now())" />
 		</div>
 		<div v-else-if="tab === 'featured'">
 			<MkNotes :pagination="featuredPagination"/>