diff --git a/public/sounds/alarm.mp3 b/public/sounds/alarm.mp3
new file mode 100644
index 0000000..29cff71
Binary files /dev/null and b/public/sounds/alarm.mp3 differ
diff --git a/src/components/toolbox/pomodoro/pomodoro.tsx b/src/components/toolbox/pomodoro/pomodoro.tsx
index 6fdeed9..aad94e5 100644
--- a/src/components/toolbox/pomodoro/pomodoro.tsx
+++ b/src/components/toolbox/pomodoro/pomodoro.tsx
@@ -9,6 +9,7 @@ import { Button } from './button';
 import { Setting } from './setting';
 
 import { useLocalStorage } from '@/hooks/use-local-storage';
+import { useSoundEffect } from '@/hooks/use-sound-effect';
 import { usePomodoroStore } from '@/store';
 
 import styles from './pomodoro.module.css';
@@ -29,6 +30,8 @@ export function Pomodoro({ onClose, show }: PomodoroProps) {
   const [timer, setTimer] = useState(0);
   const interval = useRef<ReturnType<typeof setInterval> | null>(null);
 
+  const alarm = useSoundEffect('/sounds/alarm.mp3');
+
   const defaultTimes = useMemo(
     () => ({
       long: 15 * 60,
@@ -74,13 +77,15 @@ export function Pomodoro({ onClose, show }: PomodoroProps) {
     if (timer <= 0 && running) {
       if (interval.current) clearInterval(interval.current);
 
+      alarm.play();
+
       setRunning(false);
       setCompletions(prev => ({
         ...prev,
         [selectedTab]: prev[selectedTab] + 1,
       }));
     }
-  }, [timer, selectedTab, running, setRunning]);
+  }, [timer, selectedTab, running, setRunning, alarm]);
 
   useEffect(() => {
     const time = times[selectedTab] || 10;
diff --git a/src/hooks/use-sound-effect.ts b/src/hooks/use-sound-effect.ts
new file mode 100644
index 0000000..eb47509
--- /dev/null
+++ b/src/hooks/use-sound-effect.ts
@@ -0,0 +1,45 @@
+import { useMemo, useEffect, useCallback } from 'react';
+import { Howl } from 'howler';
+
+import { useSSR } from './use-ssr';
+
+export function useSoundEffect(src: string, volume: number = 1) {
+  const { isBrowser } = useSSR();
+
+  const sound = useMemo<Howl | null>(() => {
+    let sound: Howl | null = null;
+
+    if (isBrowser) {
+      sound = new Howl({
+        html5: true,
+        src: src,
+      });
+    }
+
+    return sound;
+  }, [src, isBrowser]);
+
+  useEffect(() => {
+    if (sound) sound.volume(typeof volume === 'number' ? volume : 1);
+  }, [sound, volume]);
+
+  const play = useCallback(() => {
+    if (sound) {
+      if (!sound.playing()) {
+        sound.play();
+      }
+    }
+  }, [sound]);
+
+  const stop = useCallback(() => {
+    if (sound) sound.stop();
+  }, [sound]);
+
+  const pause = useCallback(() => {
+    if (sound) sound.pause();
+  }, [sound]);
+
+  const control = useMemo(() => ({ pause, play, stop }), [play, stop, pause]);
+
+  return control;
+}