diff --git a/src/main/java/com/example/cosmos_serversb/entities/Request.java b/src/main/java/com/example/cosmos_serversb/entities/Request.java
index 7557139..f18b8db 100644
--- a/src/main/java/com/example/cosmos_serversb/entities/Request.java
+++ b/src/main/java/com/example/cosmos_serversb/entities/Request.java
@@ -138,4 +138,8 @@
     public void setDone(boolean done) {
         this.done = done;
     }
+
+    public boolean equals(Request request) {
+        return this.rId.equals(request.getrId());
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/com/example/cosmos_serversb/models/Groups.java b/src/main/java/com/example/cosmos_serversb/models/Groups.java
index 0691c3e..c7f4b8e 100644
--- a/src/main/java/com/example/cosmos_serversb/models/Groups.java
+++ b/src/main/java/com/example/cosmos_serversb/models/Groups.java
@@ -179,6 +179,13 @@
     }
 
     public static Request getRequestDetailByGidAndRid(String gId, String rId){
+        Session session = SessionManager.getInstance().getSession();
+        Request request = session.get(Request.class, rId);
+        Group group = session.get(Group.class, gId);
+        if(group.getRequests().contains(request)) {
+            return request;
+        }
+        //違うグループのリクエストは返せない。
         return null;
     }
 
@@ -199,7 +206,13 @@
     }
 
     public static DeleteResult deleteRequest(String gId, String rId){
-        return DeleteResult.SUCCESS;
+        Session session = SessionManager.getInstance().getSession();
+        Request request = session.get(Request.class, rId);
+        if(request != null) {
+            session.delete(request);
+            return DeleteResult.SUCCESS;
+        }
+        return DeleteResult.FAILURE;
     }
 
     /*