diff --git a/src/main/java/org/ntlab/citrusserver/repositories/TodoManager.java b/src/main/java/org/ntlab/citrusserver/repositories/TodoManager.java
index cd40e22..03a880c 100644
--- a/src/main/java/org/ntlab/citrusserver/repositories/TodoManager.java
+++ b/src/main/java/org/ntlab/citrusserver/repositories/TodoManager.java
@@ -30,6 +30,7 @@
     private final HashMap<String, Integer> nextTodoId = new HashMap<>();
 
     private final BookManager bookManager;
+    private final AccountManager accountManager;
 
     public TodoManager(AccountManager accountManager, BookManager bookManager) {
         this.bookManager = bookManager;
@@ -39,7 +40,7 @@
         Calendar c = Calendar.getInstance();
         createTodo(accounts[0][0], 1, c.get(Calendar.YEAR), c.get(Calendar.MONTH) + 1, c.get(Calendar.DATE), "ダミーtodo1");
         createTodo(accounts[1][0], 1, c.get(Calendar.YEAR), c.get(Calendar.MONTH) + 1, c.get(Calendar.DATE), "ダミーtodo2");
-
+        this.accountManager = accountManager;
     }
 
     /**
@@ -179,6 +180,22 @@
         return todos.get(accountId).get(bookId).get(year).get(month).get(day).get(todoId);
     }
 
+    public void putTodoById(String accountId, int bookId, int year, int month, int day, int todoId, String token,
+                            int newBookId, int newYear, int newMonth, int newDay, String newTitle){
+            if(todos.get(accountId).containsKey(bookId)){
+                if(todos.get(accountId).get(bookId).containsKey(year)){
+                    if(todos.get(accountId).get(bookId).get(year).containsKey(month)){
+                        if(todos.get(accountId).get(bookId).get(year).get(month).containsKey(day)){
+                            if(todos.get(accountId).get(bookId).get(year).get(month).get(day).containsKey(todoId)){
+                                todos.get(accountId).get(bookId).get(year).get(month).get(day).remove(todoId);
+                                createTodo(accountId, newBookId, newYear, newMonth, newDay, newTitle);
+                            }
+                        }
+                    }
+                }
+            }
+    }
+
     /**
      *todo_idを指定してtodoを返す
      *