diff --git a/CHANGELOG.md b/CHANGELOG.md
index 89a8cc3ee3..a6fd309526 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -33,6 +33,7 @@
   * 画像が全て隠れた状態で表示されるようになります
 - 1枚だけのメディアリストの画像のアスペクト比を画像に応じて縦長にするように
 - Fix: リアクションをホバーした時のユーザーリストで猫耳が切れてしまっていた問題を修正
+- 新しい実績を追加
 
 ### Server
 - Fix: エクスポートデータの拡張子がunknownになる問題を修正
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 8c1334c6a8..6f6f49ab22 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -1199,6 +1199,9 @@ _achievements:
     _client30min:
       title: "ひとやすみ"
       description: "クライアントを起動してから30分以上経過した"
+    _client60min:
+      title: "Misskeyの見すぎ"
+      description: "クライアントを起動してから60分以上経過した"
     _noteDeletedWithin1min:
       title: "いまのなし"
       description: "投稿してから1分以内にその投稿を削除した"
diff --git a/packages/backend/src/core/AchievementService.ts b/packages/backend/src/core/AchievementService.ts
index 1ca38d8bb0..9e223f1492 100644
--- a/packages/backend/src/core/AchievementService.ts
+++ b/packages/backend/src/core/AchievementService.ts
@@ -64,6 +64,7 @@ export const ACHIEVEMENT_TYPES = [
 	'iLoveMisskey',
 	'foundTreasure',
 	'client30min',
+	'client60min',
 	'noteDeletedWithin1min',
 	'postedAtLateNight',
 	'postedAt0min0sec',
diff --git a/packages/frontend/src/init.ts b/packages/frontend/src/init.ts
index 91cdc15ef9..d40b761329 100644
--- a/packages/frontend/src/init.ts
+++ b/packages/frontend/src/init.ts
@@ -431,6 +431,10 @@ if ($i) {
 		claimAchievement('client30min');
 	}, 1000 * 60 * 30);
 
+	window.setTimeout(() => {
+		claimAchievement('client60min');
+	}, 1000 * 60 * 60);
+
 	const lastUsed = miLocalStorage.getItem('lastUsed');
 	if (lastUsed) {
 		const lastUsedDate = parseInt(lastUsed, 10);
diff --git a/packages/frontend/src/scripts/achievements.ts b/packages/frontend/src/scripts/achievements.ts
index 25e8b71a12..f1da8a76da 100644
--- a/packages/frontend/src/scripts/achievements.ts
+++ b/packages/frontend/src/scripts/achievements.ts
@@ -60,6 +60,7 @@ export const ACHIEVEMENT_TYPES = [
 	'iLoveMisskey',
 	'foundTreasure',
 	'client30min',
+	'client60min',
 	'noteDeletedWithin1min',
 	'postedAtLateNight',
 	'postedAt0min0sec',
@@ -343,6 +344,11 @@ export const ACHIEVEMENT_BADGES = {
 		bg: 'linear-gradient(0deg, rgb(220 223 225), rgb(172 192 207))',
 		frame: 'bronze',
 	},
+	'client60min': {
+		img: '/fluent-emoji/1f552.png',
+		bg: 'linear-gradient(0deg, rgb(220 223 225), rgb(172 192 207))',
+		frame: 'silver',
+	},
 	'noteDeletedWithin1min': {
 		img: '/fluent-emoji/1f5d1.png',
 		bg: 'linear-gradient(0deg, rgb(220 223 225), rgb(172 192 207))',