diff --git a/sort/insertion-sort.mjs b/sort/insertion-sort.mjs
new file mode 100644
index 0000000..ab9f233
--- /dev/null
+++ b/sort/insertion-sort.mjs
@@ -0,0 +1,19 @@
+import { generateRandomArray, isSort } from "../util/index.mjs";
+
+export function insertionSort(arr){
+    let n = arr.length;
+    for (let i = 1; i<n; i++) {
+        let currentElement = arr[i]
+        let j = i-1
+        while(j>=0 && arr[j] > currentElement) {
+            arr[j+1] = arr[j]
+            j--
+        }
+        arr[j+1] = currentElement
+    }
+}
+
+let arr = generateRandomArray(1000)
+
+insertionSort(arr)
+console.log(isSort(arr));
\ No newline at end of file