diff --git a/backend/app/api/api_v1/routers/kintone.py b/backend/app/api/api_v1/routers/kintone.py
index e4ba734..d10885d 100644
--- a/backend/app/api/api_v1/routers/kintone.py
+++ b/backend/app/api/api_v1/routers/kintone.py
@@ -194,8 +194,9 @@ def addfieldstokintone(app:str,fields:dict,c:config.KINTONE_ENV,revision:str = N
     else:
         data = {"app":app,"properties":fields}
     r = httpx.post(url,headers=headers,data=json.dumps(data))
+    r.raise_for_status()
     return r.json()
-
+ 
 def updatefieldstokintone(app:str,revision:str,fields:dict,c:config.KINTONE_ENV):
     headers={config.API_V1_AUTH_KEY:c.API_V1_AUTH_VALUE,"Content-Type": "application/json"}
     url = f"{c.BASE_URL}{config.API_V1_STR}/preview/app/form/fields.json"
diff --git a/backend/app/core/apiexception.py b/backend/app/core/apiexception.py
index b6908d8..808caef 100644
--- a/backend/app/core/apiexception.py
+++ b/backend/app/core/apiexception.py
@@ -1,22 +1,35 @@
 from fastapi import HTTPException, status
+import httpx
 from app.db.schemas import ErrorCreate
 from app.db.session import SessionLocal
 from app.db.crud import create_log
 
 class APIException(Exception):
-
-    def __init__(self,location:str,title:str,content:str,e:Exception):
-      if(str(e) == ''):
-          content += e.detail
-          self.detail = e.detail
-          self.status_code = e.status_code
-      else:
-          self.detail = str(e)
-          content += str(e)
-          self.status_code = 500
-      if(len(content) > 5000):
-         content =content[0:5000]
-      self.error = ErrorCreate(location=location,title=title,content=content)
+    def __init__(self, location: str, title: str, content: str, e: Exception):
+        self.detail = str(e)
+        self.status_code = 500
+        if isinstance(e,httpx.HTTPStatusError):
+            try:
+                error_response = e.response.json()
+                self.detail = error_response.get('message', self.detail)
+                self.status_code = e.response.status_code
+                content += self.detail
+            except ValueError:
+                pass
+        elif hasattr(e, 'detail'):
+            self.detail = e.detail
+            self.status_code = e.status_code if hasattr(e, 'status_code') else 500
+            content += e.detail
+        else:
+            self.detail = str(e)
+            self.status_code = 500
+            content += str(e)
+        
+        if len(content) > 5000:
+            content = content[:5000]
+        
+        self.error = ErrorCreate(location=location, title=title, content=content)
+        super().__init__(self.error)
 
 def writedblog(exc: APIException):
     db = SessionLocal()
diff --git a/frontend/src/components/DocUpload.vue b/frontend/src/components/DocUpload.vue
index 5dd0c46..3a89476 100644
--- a/frontend/src/components/DocUpload.vue
+++ b/frontend/src/components/DocUpload.vue
@@ -15,7 +15,7 @@
 
 </template>
 <script setup lang="ts">
- import { createUploaderComponent, useQuasar } from 'quasar';
+import { createUploaderComponent, useQuasar } from 'quasar';
 import { useAuthStore } from 'src/stores/useAuthStore';
 import { ref } from 'vue';
     const $q=useQuasar();
@@ -40,7 +40,7 @@ import { ref } from 'vue';
     function onUploadFinished({xhr}:{xhr:XMLHttpRequest}){
       let msg="ファイルのアップロードが完了しました。";
       if(xhr && xhr.response){
-          msg=`${msg} (${xhr.responseText})`;
+        msg=`${msg} (${xhr.responseText})`;
       }
       $q.notify({
         type: 'positive',
@@ -52,14 +52,28 @@ import { ref } from 'vue';
       }, 2000);
     }
 
+    /**
+     * 例外発生時、responseからエラー情報を取得する
+     * @param xhr
+     */
+    function getResponseError(xhr:XMLHttpRequest){
+      try{
+        const resp = JSON.parse(xhr.responseText);
+        return 'detail' in resp ? resp.detail:'';
+      }catch(err){
+        return xhr.responseText;
+      }
+    }
+
     /**
      *
      * @param info ファイルアップロード失敗時の処理
      */
-    function onFailed({files,xhr}:{files: readonly any[],xhr:any}){
+    function onFailed({files,xhr}:{files: readonly any[],xhr:XMLHttpRequest}){
       let msg ="ファイルアップロードが失敗しました。";
       if(xhr && xhr.status){
-          msg=`${msg} (${xhr.status }:${xhr.statusText})`
+         const detail = getResponseError(xhr);
+        msg=`${msg} (${xhr.status }:${detail})`
       }
       $q.notify({
         type:"negative",