diff --git a/src/main/java/org/ntlab/tampoposerver/repositories/ActivityRepository.java b/src/main/java/org/ntlab/tampoposerver/repositories/ActivityRepository.java
index de69a3e..9f20f74 100644
--- a/src/main/java/org/ntlab/tampoposerver/repositories/ActivityRepository.java
+++ b/src/main/java/org/ntlab/tampoposerver/repositories/ActivityRepository.java
@@ -47,7 +47,7 @@
     }
 
     //アクティビティのテキストが存在しないとき
-    public boolean isValidActivity(String userId, String activityId, String textId) {
+    public boolean isValidActivity(String userId, String activityId) {
         HashMap<String, Activity> userActivities = activityMap.get(userId);
         if (userActivities == null) return false;
 
@@ -57,7 +57,7 @@
         String activityText = activity.getText();
         if (activityText == null || activityText == "") return false;
 
-        return activityText.equals(textId);
+        return true;
     }
 
     //アクティビティを削除するメソッド