diff --git a/popcorn/Assets/MyGame/Scenes/Cooking/Scripts/Corn.cs b/popcorn/Assets/MyGame/Scenes/Cooking/Scripts/Corn.cs
index fe1032a0..55887797 100644
--- a/popcorn/Assets/MyGame/Scenes/Cooking/Scripts/Corn.cs
+++ b/popcorn/Assets/MyGame/Scenes/Cooking/Scripts/Corn.cs
@@ -146,8 +146,8 @@ public class Corn : MonoBehaviour
 
     public void SetCornProperty(float popTime, float burntDuration, float spillSpeed, float popSpeed)
     {
-        cornPopTime = popTime + Random.Range(0, 5f);
-        cornBurntTime = cornPopTime + burntDuration + Random.Range(0, 1f);
+        cornPopTime = popTime;
+        cornBurntTime = cornPopTime + burntDuration;
         cornSpillSpeed = spillSpeed;
         cornPopSpeed = popSpeed;
     }
diff --git a/popcorn/Assets/MyGame/Scenes/Cooking/Scripts/CornManager.cs b/popcorn/Assets/MyGame/Scenes/Cooking/Scripts/CornManager.cs
index 9278f7aa..ccf06e07 100644
--- a/popcorn/Assets/MyGame/Scenes/Cooking/Scripts/CornManager.cs
+++ b/popcorn/Assets/MyGame/Scenes/Cooking/Scripts/CornManager.cs
@@ -29,7 +29,9 @@ public class CornManager : MonoBehaviour
     [SerializeField] private float coldGrowSpeed = .1f;
     [SerializeField] private float hotGrowSpeed = 2f;
     [SerializeField] private float baseCornPopTime = 5f;
+    [SerializeField] private float cornPopRandom = 5f;
     [SerializeField] private float cornBurntDuration = 5f;
+    [SerializeField] private float cornBurntRandom = 1f;
     [SerializeField] private float cornSpillSpeed = 50f;
     [SerializeField] private float cornPopSpeed = 20f;
 
@@ -137,7 +139,7 @@ public class CornManager : MonoBehaviour
         {
             var corn = Instantiate(cornPrefab, cornSpawnTarget);
             cornArray[i] = corn;
-            corn.SetCornProperty(baseCornPopTime, cornBurntDuration, cornSpillSpeed, cornPopSpeed);
+            corn.SetCornProperty(baseCornPopTime + Random.Range(0f, cornPopRandom), cornBurntDuration + Random.Range(0f, cornBurntRandom), cornSpillSpeed, cornPopSpeed);
             
             // 進行速度の変更時、コーン速度変更
             cornGrowSpeed.TakeWhile(_ => !isCompleted).Subscribe(x =>