diff --git a/audios/else/countdown-sound.mp3 b/audios/else/countdown-sound.mp3
new file mode 100644
index 0000000..534eb42
Binary files /dev/null and b/audios/else/countdown-sound.mp3 differ
diff --git a/js/dinosaur/dinosaur.js b/js/dinosaur/dinosaur.js
index d51820e..64e15b5 100644
--- a/js/dinosaur/dinosaur.js
+++ b/js/dinosaur/dinosaur.js
@@ -42,6 +42,10 @@ function updateGameContent() {
     id="insertCoin"
     src="audios/else/insert-coin.mp3"
   ></audio>
+  <audio
+    id="countdownSound"
+    src="audios/else/countdown-sound.mp3" loop
+  ></audio>
   <div id="game" class="game hide">
     <br>
     <spa style="font-size: 12px">Coin: </spa>
diff --git a/js/dinosaur/main.js b/js/dinosaur/main.js
index 2eb7d55..eaf4b01 100644
--- a/js/dinosaur/main.js
+++ b/js/dinosaur/main.js
@@ -139,6 +139,7 @@
         <p>INSERT COIN</p>
       `;
         count--;
+        playSound("countdownSound");
         if (count === -1) {
           clearInterval(countdownInterval);
           // 10초 카운트가 끝나면 아래 코드 실행
@@ -146,6 +147,7 @@
           document.removeEventListener("keydown", onJump);
           document.removeEventListener("keydown", modalButtonSelection);
           document.removeEventListener("keydown", handleInsertKeyPress);
+          pauseMusic("countdownSound");
           // 화면 조정
           mainPage.style.transform = "scale(1)"; // 줌 아웃
           mainPage.style.transition = ".5s";
@@ -154,7 +156,7 @@
 
           // 게임 선택 화면 보이기
           const gameSelection = document.getElementById("content");
-          mainBgm.play();
+          playSound("mainBgm");
           gameSelection.innerHTML = `
         <div id="game-selection">
           <p id="selected-game">← Dino →</p>
@@ -174,12 +176,13 @@
       // 화면 조정
       mainPage.style.transform = "scale(1)"; // 줌 아웃
       mainPage.style.transition = ".5s";
+      pauseMusic("countdownSound");
 
       gameStartDisplay.style.display = "block";
 
       // 게임 선택 화면 보이기
       const gameSelection = document.getElementById("content");
-      mainBgm.play();
+      playSound("mainBgm");
       gameSelection.innerHTML = `
       <div id="game-selection">
         <p id="selected-game">← Dino →</p>
@@ -199,7 +202,7 @@
 
       GlobalState.isGameActive = false; // 게임 종료 상태로 설정
       clearInterval(countdownInterval); // 카운트 다운 인터벌 중지
-
+      pauseMusic("countdownSound");
       // 카운트 다운 화면 제거
       if (countdown) {
         countdown.remove();
diff --git a/js/tetris/main.js b/js/tetris/main.js
index 7b42b7f..00d1397 100644
--- a/js/tetris/main.js
+++ b/js/tetris/main.js
@@ -517,10 +517,12 @@
         <p>INSERT COIN</p>
       `;
         count--;
+        countdownSound.play();
         if (count === -1) {
           GlobalState.currentGame = null;
           clearInterval(countdownInterval);
           // 10초 카운트가 끝나면 아래 코드 실행
+          countdownSound.pause();
 
           // 화면 조정
           mainPage.style.transform = "scale(1)"; // 줌 아웃
@@ -537,15 +539,14 @@
       `;
 
           GlobalState.isGameActive = false;
-          countdown.remove();
-          countdown.style.display = "none";
         }
       }, 1000);
       const content = document.getElementById("content");
       content.appendChild(countdown);
     } else {
       //countdown.style.display = "none";
-
+      document.removeEventListener("keydown", handleInsertKeyPress);
+      countdownSound.pause();
       // 화면 조정
       mainPage.style.transform = "scale(1)"; // 줌 아웃
       mainPage.style.transition = ".5s";
@@ -576,6 +577,7 @@
 
       GlobalState.isGameActive = true; // 게임 종료 상태로 설정
       clearInterval(countdownInterval); // 카운트 다운 인터벌 중지
+      countdownSound.pause();
 
       // 카운트 다운 화면 제거
       if (countdown) {
diff --git a/js/tetris/sound.js b/js/tetris/sound.js
index ecd68b1..32f8415 100644
--- a/js/tetris/sound.js
+++ b/js/tetris/sound.js
@@ -77,6 +77,10 @@ let sound = new Sound(document.querySelector("#sound-div")),
   escSound = sound.create("audios/else/esc-on.mp3", "esc_sound"),
   escMove = sound.create("audios/else/esc-move.mp3", "esc_move"),
   mainBgm = sound.create("audios/else/main-bgm.mp3", "main_bgm"),
-  insertCoin = sound.create("audios/else/insert-coin.mp3", "insert-coin");
+  insertCoin = sound.create("audios/else/insert-coin.mp3", "insert-coin"),
+  countdownSound = sound.create(
+    "audios/else/countdown-sound.mp3",
+    "countdown-sound"
+  );
 sound.muteToggle();
 sound.soundSetting();