diff --git a/packages/taro-components/types/Swiper.d.ts b/packages/taro-components/types/Swiper.d.ts
index 59d35a142595..cd79df7af9f1 100644
--- a/packages/taro-components/types/Swiper.d.ts
+++ b/packages/taro-components/types/Swiper.d.ts
@@ -124,7 +124,7 @@ interface SwiperItemProps extends StandardProps {
   /**
    * 该 swiper-item 的标识符
    */
-  itemId: string
+  itemId?: string
 }
 
 declare const SwiperItem: ComponentType<SwiperItemProps>