diff --git a/.changeset/modern-balloons-wash.md b/.changeset/modern-balloons-wash.md
new file mode 100644
index 0000000000..a17be75f9b
--- /dev/null
+++ b/.changeset/modern-balloons-wash.md
@@ -0,0 +1,5 @@
+---
+"@heroui/breadcrumbs": patch
+---
+
+fixed missing key for ellipsisItem in breadcrumbs (#4973)
diff --git a/packages/components/breadcrumbs/src/breadcrumbs.tsx b/packages/components/breadcrumbs/src/breadcrumbs.tsx
index dced77d036..db7e24bb12 100644
--- a/packages/components/breadcrumbs/src/breadcrumbs.tsx
+++ b/packages/components/breadcrumbs/src/breadcrumbs.tsx
@@ -1,4 +1,4 @@
-import {cloneElement, useMemo} from "react";
+import {cloneElement, isValidElement, useMemo} from "react";
 import {forwardRef} from "@heroui/system";
 import {ChevronRightIcon, EllipsisIcon} from "@heroui/shared-icons";
 import {warn} from "@heroui/shared-utils";
@@ -90,7 +90,7 @@ const Breadcrumbs = forwardRef<"div", BreadcrumbsProps>((props, ref) => {
 
     return [
       ...items.slice(0, itemsBeforeCollapse),
-      ellipsisItem,
+      isValidElement(ellipsisItem) && cloneElement(ellipsisItem, {key: "ellipsis-item"}),
       ...items.slice(items.length - itemsAfterCollapse, items.length),
     ];
   }, [