diff --git a/src/main/java/org/ntlab/citrusserver/resources/ScheduleRest.java b/src/main/java/org/ntlab/citrusserver/resources/ScheduleRest.java
index d65ee15..7b349f0 100644
--- a/src/main/java/org/ntlab/citrusserver/resources/ScheduleRest.java
+++ b/src/main/java/org/ntlab/citrusserver/resources/ScheduleRest.java
@@ -84,7 +84,12 @@
                                 @FormParam("start_time") String startTime,@FormParam("end_time") String endTime,@FormParam("book_id") Integer bookId,
                                 @FormParam("token") String token) {
         if(accountManager.checkToken(accountId,token)) {
-            return scheduleManager.addSchedule(accountId, year, month, day,title,startTime,endTime,bookId);
+            Schedule schedule=scheduleManager.addSchedule(accountId, year, month, day,title,startTime,endTime,bookId);
+            if(schedule==null){
+                var response = Response.status(Response.Status.NOT_FOUND).entity("その本は存在しません");
+                throw new WebApplicationException(response.build());
+            }
+            return schedule;
 
         }else {
             var response = Response.status(Response.Status.FORBIDDEN).entity("認証失敗");
@@ -180,8 +185,12 @@
                                          @PathParam("month") Integer month, @PathParam("day") Integer day,
                                          @PathParam("schedule_id") Integer scheduleId, @FormParam("token") String token, @FormParam("book_id") Integer bookId) {
         if(accountManager.checkToken(accountId,token)) {
-            scheduleManager.setSchedulesBookId(accountId, year, month, day, scheduleId, bookId);
-            return "success";
+            int x=scheduleManager.setSchedulesBookId(accountId, year, month, day, scheduleId, bookId);
+            if(x==-1){
+                return "その本は存在していません";
+            }else{
+                return "success";
+            }
         }else {
             var response = Response.status(Response.Status.FORBIDDEN).entity("認証失敗");
             throw new WebApplicationException(response.build());