diff --git a/src/main/java/org/ntlab/citrusserver/repositories/FavoriteManager.java b/src/main/java/org/ntlab/citrusserver/repositories/FavoriteManager.java
index 509ff42..af2a911 100644
--- a/src/main/java/org/ntlab/citrusserver/repositories/FavoriteManager.java
+++ b/src/main/java/org/ntlab/citrusserver/repositories/FavoriteManager.java
@@ -5,10 +5,6 @@
 import java.util.HashMap;
 import java.util.HashSet;
 
-
-import java.util.HashMap;
-import java.util.HashSet;
-
 @Repository
 public class FavoriteManager {
     private final AccountManager accountManager;
@@ -36,10 +32,9 @@
         if(!favoritedMap.containsKey(accountId)) { //accountがなかったらbookidとotheraccountsの空のハッシュマップを用意
             favoritedMap.put(accountId, new HashMap<>());
         }
-        if(!favoritedMap.containsKey(bookId)) { //accountがなかったらbookidとotheraccountsの空のハッシュマップを用意
+        if(!favoritedMap.get(accountId).containsKey(bookId)) { //bookIdがなかったらotheraccountsの空のハッシュセットを用意
             favoritedMap.get(accountId).put(bookId, new HashSet<>());
         }
-
         favoritedMap.get(accountId).get(bookId).add(otherAccountId);
     }
     //delete
@@ -51,7 +46,7 @@
 
 
 
-    HashMap<String, HashMap<String , HashSet<Integer>>> favoritesMap = new HashMap();
+    HashMap<String, HashMap<String , HashSet<Integer>>> favoritesMap = new HashMap<>();
 
 
     //いいねした本の一覧を返す