diff --git a/app/src/main/java/com/example/nemophila/Nemophila.java b/app/src/main/java/com/example/nemophila/Nemophila.java
index 00a9120..8408f01 100644
--- a/app/src/main/java/com/example/nemophila/Nemophila.java
+++ b/app/src/main/java/com/example/nemophila/Nemophila.java
@@ -207,4 +207,11 @@
         return friendIds;
     }
 
+    // tokenを削除
+    public void logout(){
+        SharedPreferences preferences = getSharedPreferences("prefData", MODE_PRIVATE);
+        SharedPreferences.Editor editor = preferences.edit();
+        editor.remove("token");
+        editor.commit();
+    }
 }