diff --git a/src/main/java/org/ntlab/citrusserver/repositories/TodoManager.java b/src/main/java/org/ntlab/citrusserver/repositories/TodoManager.java
index cd40e22..4595917 100644
--- a/src/main/java/org/ntlab/citrusserver/repositories/TodoManager.java
+++ b/src/main/java/org/ntlab/citrusserver/repositories/TodoManager.java
@@ -338,6 +338,33 @@
         return 1;
     }
 
+    public int setTodo(String accountId, int bookId, int year, int month, int day, int todoId, String title){
+        if(!todos.containsKey(accountId)){
+            return -1;
+        }
+        if(!todos.get(accountId).containsKey(bookId)){
+            return -1;
+        }
+        if(!todos.get(accountId).get(bookId).containsKey(year)){
+            return -1;
+        }
+        if(!todos.get(accountId).get(bookId).get(year).containsKey(month)){
+            return -1;
+        }
+        if(!todos.get(accountId).get(bookId).get(year).get(month).containsKey(day)){
+            return -1;
+        }
+        if(!todos.get(accountId).get(bookId).get(year).get(month).get(day).containsKey(todoId)){
+            return -1;
+        }
+        todos.get(accountId).get(bookId).get(year).get(month).get(day).get(todoId).setTitle(title);
+        todos.get(accountId).get(bookId).get(year).get(month).get(day).get(todoId).setBookId(bookId);
+        todos.get(accountId).get(bookId).get(year).get(month).get(day).get(todoId).setYear(year);
+        todos.get(accountId).get(bookId).get(year).get(month).get(day).get(todoId).setMonth(month);
+        todos.get(accountId).get(bookId).get(year).get(month).get(day).get(todoId).setDay(day);
+        return 1;
+    }
+
     /**
      *todo_idを指定してtodoの達成状態を変更
      *
diff --git a/src/main/java/org/ntlab/citrusserver/resources/TodoRest.java b/src/main/java/org/ntlab/citrusserver/resources/TodoRest.java
index 50bdee9..b435fc2 100644
--- a/src/main/java/org/ntlab/citrusserver/resources/TodoRest.java
+++ b/src/main/java/org/ntlab/citrusserver/resources/TodoRest.java
@@ -9,6 +9,7 @@
 import org.ntlab.citrusserver.repositories.BookManager;
 import org.ntlab.citrusserver.repositories.TodoManager;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.cache.annotation.CachePut;
 import org.springframework.stereotype.Component;
 
 import java.util.HashMap;
@@ -113,6 +114,24 @@
         }
     }
 
+    @PUT
+    @Path("/{account_id}/books/{book_id}/todos/{year}/{month}/{day}/{todo_id}")
+    @Consumes(MediaType.APPLICATION_FORM_URLENCODED)
+    @Produces(MediaType.APPLICATION_JSON)
+    public void setTodo(@PathParam("account_id") String account_id, @PathParam("book_id") Integer book_id, @PathParam("year") Integer year,
+                        @PathParam("month") Integer month, @PathParam("day") Integer day, @PathParam("todo_id") Integer todo_id, @FormParam("title") String title,
+                        @FormParam("new_year") Integer new_year,@FormParam("new_month") Integer new_month,@FormParam("new_day") Integer new_day, @FormParam("token") String token){
+        if (accountManager.checkToken(account_id, token)) {
+            if (todoManager.setTodo(account_id, book_id, new_year, new_month, new_day, todo_id, title) == -1) {
+                var response = Response.status(Response.Status.BAD_REQUEST).entity("変更失敗");
+                throw new WebApplicationException(response.build());
+            }
+        }else{
+            var response = Response.status(Response.Status.FORBIDDEN).entity("認証失敗");
+            throw new WebApplicationException(response.build());
+        }
+    }
+
 
    /* //本のtodoを年月日とtodo_idを指定してそのtodoを削除する
     @DELETE