diff --git a/popcorn/Assets/MyGame/Scenes/MiniGame/MiniGame.unity b/popcorn/Assets/MyGame/Scenes/MiniGame/MiniGame.unity
index 28951055..0a7a1b26 100644
--- a/popcorn/Assets/MyGame/Scenes/MiniGame/MiniGame.unity
+++ b/popcorn/Assets/MyGame/Scenes/MiniGame/MiniGame.unity
@@ -1394,8 +1394,8 @@ PrefabInstance:
       objectReference: {fileID: 0}
     - target: {fileID: 2607884839347368726, guid: acd6e6365b5fe4863aedc684a50b8028,
         type: 3}
-      propertyPath: flyingFallSpeed
-      value: 0.02
+      propertyPath: fallAcceleration
+      value: 19.6
       objectReference: {fileID: 0}
     - target: {fileID: 4931350312200274921, guid: acd6e6365b5fe4863aedc684a50b8028,
         type: 3}
diff --git a/popcorn/Assets/MyGame/Scenes/MiniGame/Scripts/Player.cs b/popcorn/Assets/MyGame/Scenes/MiniGame/Scripts/Player.cs
index 49ee7014..e1d5cf9d 100644
--- a/popcorn/Assets/MyGame/Scenes/MiniGame/Scripts/Player.cs
+++ b/popcorn/Assets/MyGame/Scenes/MiniGame/Scripts/Player.cs
@@ -13,8 +13,8 @@ namespace MyGame.Scenes.MiniGame.Scripts
         [SerializeField] private float hitWaitTime = 1f;
         [SerializeField] private AnimationCurve jumpAnimationCurve;
         [SerializeField] private AnimationCurve hitAnimationCurve;
-        [SerializeField] private float flyingFallSpeed;
-        [SerializeField] private float fallSpeed;
+        [SerializeField] private float flyingFallSpeed = 1f;
+        [SerializeField] private float fallAcceleration = 9.8f;
         [SerializeField] private GameObject itemHitCollider;
         [SerializeField] private GameObject obstacleHitCollider;
         [SerializeField] private GameObject level1;
@@ -124,6 +124,7 @@ namespace MyGame.Scenes.MiniGame.Scripts
             if (isFall && active && !isFlying)
             {
                 isFlying = true;
+                var currentSpeed = 0f;
                 this.SafeStopCoroutine(jumpFallCoroutine);
                 jumpHoldDisposable?.Dispose();
                 jumpHoldDisposable = this.UpdateAsObservable()
@@ -131,8 +132,16 @@ namespace MyGame.Scenes.MiniGame.Scripts
                     .Subscribe(_ =>
                     {
                         // 滑空or落下切り替え
-                        var currentSpeed = isButtonHold ? -flyingFallSpeed : -fallSpeed;
-                        transform.AddLocalPositionY(currentSpeed);
+                        if (isButtonHold)
+                        {
+                            currentSpeed = -flyingFallSpeed;
+                        }
+                        else
+                        {
+                            currentSpeed -= fallAcceleration * Time.deltaTime;
+                        }
+
+                        transform.AddLocalPositionY(currentSpeed * Time.deltaTime);
                     }, () =>
                     {
                         isJump = false;