diff --git a/src/main/java/org/ntlab/citrusserver/resources/BooksRest.java b/src/main/java/org/ntlab/citrusserver/resources/BooksRest.java
index 6e8982c..27ef254 100644
--- a/src/main/java/org/ntlab/citrusserver/resources/BooksRest.java
+++ b/src/main/java/org/ntlab/citrusserver/resources/BooksRest.java
@@ -6,6 +6,7 @@
 import org.ntlab.citrusserver.entities.Book;
 import org.ntlab.citrusserver.repositories.AccountManager;
 import org.ntlab.citrusserver.repositories.BookManager;
+import org.ntlab.citrusserver.repositories.FavoriteManager;
 import org.ntlab.citrusserver.repositories.TodoManager;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Component;
@@ -22,12 +23,14 @@
     private final BookManager bookManager;
     private final AccountManager accountManager;
     private final TodoManager todoManager;
+    private final FavoriteManager favoriteManager;
     @Autowired  // スプリングブートにいうサイン
-    public BooksRest(BookManager bm, AccountManager ac, TodoManager tm){//public クラス名（）がコンストラクタ
+    public BooksRest(BookManager bm, AccountManager ac, TodoManager tm, FavoriteManager fm){//public クラス名（）がコンストラクタ
 
         bookManager = bm;
         accountManager = ac;
         todoManager = tm;
+        favoriteManager = fm;
     }
 
 
@@ -77,6 +80,7 @@
         accountCheck(account_id);
         tokenCheck(account_id, token);
         todoManager.deleteAllTodosByBookId(account_id, book_id);//削除時、Todoも消す
+        favoriteManager.removeFavoriteByBookID(account_id, book_id);//削除時、Favoriteも消す
         bookManager.deleteBook(account_id, book_id);
         return "success";
     }