diff --git a/src/main/java/org/ntlab/citrusserver/repositories/FavoriteManager.java b/src/main/java/org/ntlab/citrusserver/repositories/FavoriteManager.java
new file mode 100644
index 0000000..3649989
--- /dev/null
+++ b/src/main/java/org/ntlab/citrusserver/repositories/FavoriteManager.java
@@ -0,0 +1,50 @@
+package org.ntlab.citrusserver.repositories;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Repository;
+
+import java.util.HashMap;
+import java.util.HashSet;
+
+
+@Repository
+public class FavoriteManager {
+
+    HashMap<String, HashMap<String , HashSet<Integer>>> favoritesMap = new HashMap();
+    private final AccountManager accountManager; //仮
+
+    @Autowired
+    public FavoriteManager(AccountManager accountManager) {
+        this.accountManager = accountManager;
+    }
+
+    //いいねした本の一覧を返す
+    public HashMap<String, HashSet<Integer>> getFavorites(String accountId) {
+        if(accountManager.getAccount(accountId) == null) return null;
+        return favoritesMap.get(accountId);
+    }
+
+    //取得したotherAccountIdのいいねした本を返す
+    public HashSet<Integer> getFavoritesByID(String accountId, String otherAccountId) {
+        if(accountManager.getAccount(accountId) == null) return null;
+        if(!favoritesMap.get(accountId).containsKey(otherAccountId)) return null;
+        return favoritesMap.get(accountId).get(otherAccountId);
+    }
+
+    //いいねした本を追加する
+    public void putFavorites(String accountId, String otherAccountId, Integer bookId) {
+        if(!favoritesMap.containsKey(accountId)){
+            favoritesMap.put(accountId, new HashMap<>());
+        }
+        if(!favoritesMap.get(accountId).containsKey(otherAccountId)){
+            favoritesMap.get(accountId).put(otherAccountId, new HashSet<>());
+        }
+        favoritesMap.get(accountId).get(otherAccountId).add(bookId);
+
+    }
+    //いいねした本を消去する
+    public void removeFavorites(String accountId, String otherAccountId, Integer bookId) {
+        favoritesMap.get(accountId).get(otherAccountId).remove(bookId);
+    }
+
+}