diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index e5a37fdc2..b139b3829 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -2020,6 +2020,8 @@ pages:
   page-created: "ページを作成しました"
   page-updated: "ページを更新しました"
   name-already-exists: "指定されたページURLは既に存在しています"
+  title-invalid-name: "不正なページURLです"
+  text-invalid-name: "空白でないか確認してください"
   are-you-sure-delete: "このページを削除しますか？"
   page-deleted: "ページを削除しました"
   edit-this-page: "このページを編集"
diff --git a/src/client/app/common/views/pages/page-editor/page-editor.vue b/src/client/app/common/views/pages/page-editor/page-editor.vue
index b8db59da4..0e7417700 100644
--- a/src/client/app/common/views/pages/page-editor/page-editor.vue
+++ b/src/client/app/common/views/pages/page-editor/page-editor.vue
@@ -232,6 +232,23 @@ export default Vue.extend({
 				eyeCatchingImageId: this.eyeCatchingImageId,
 			};
 
+			function onError(err) {
+				if (err.id == '3d81ceae-475f-4600-b2a8-2bc116157532') {
+						if (err.info.param == 'name') {
+							this.$root.dialog({
+								type: 'error',
+								title: this.$t('title-invalid-name'),
+								text: this.$t('text-invalid-name')
+							});
+						}
+					} else if (err.code == 'NAME_ALREADY_EXISTS') {
+						this.$root.dialog({
+							type: 'error',
+							text: this.$t('name-already-exists')
+						});
+					}
+			}
+
 			if (this.pageId) {
 				options.pageId = this.pageId;
 				this.$root.api('pages/update', options)
@@ -242,12 +259,7 @@ export default Vue.extend({
 						text: this.$t('page-updated')
 					});
 				}).catch(err => {
-					if(err.id == '2298a392-d4a1-44c5-9ebb-ac1aeaa5a9ab'){
-						this.$root.dialog({
-							type: 'error',
-							text: this.$t('name-already-exists')
-						});
-					}
+					onError(err);
 				});
 			} else {
 				this.$root.api('pages/create', options)
@@ -260,12 +272,7 @@ export default Vue.extend({
 					});
 					this.$router.push(`/i/pages/edit/${this.pageId}`);
 				}).catch(err => {
-					if(err.id == '4650348e-301c-499a-83c9-6aa988c66bc1'){
-						this.$root.dialog({
-							type: 'error',
-							text: this.$t('name-already-exists')
-						});
-					}
+					onError(err);
 				});
 			}
 		},
diff --git a/src/server/api/endpoints/pages/create.ts b/src/server/api/endpoints/pages/create.ts
index f18c82ffd..62077fa95 100644
--- a/src/server/api/endpoints/pages/create.ts
+++ b/src/server/api/endpoints/pages/create.ts
@@ -29,7 +29,7 @@ export const meta = {
 		},
 
 		name: {
-			validator: $.str,
+			validator: $.str.min(1),
 		},
 
 		summary: {
diff --git a/src/server/api/endpoints/pages/update.ts b/src/server/api/endpoints/pages/update.ts
index 564beb84c..e98aedefa 100644
--- a/src/server/api/endpoints/pages/update.ts
+++ b/src/server/api/endpoints/pages/update.ts
@@ -36,7 +36,7 @@ export const meta = {
 		},
 
 		name: {
-			validator: $.optional.str,
+			validator: $.str.min(1),
 		},
 
 		summary: {