diff --git a/E_1991_FindtheMiddleIndexinArray.py b/E_1991_FindtheMiddleIndexinArray.py
new file mode 100644
index 0000000..613c74e
--- /dev/null
+++ b/E_1991_FindtheMiddleIndexinArray.py
@@ -0,0 +1,6 @@
+class Solution:
+    def findMiddleIndex(self, nums: List[int]) -> int:
+        for i in range(len(nums)):
+            if sum(nums[:i])==sum(nums[i+1:]):
+                return i
+        return -1
\ No newline at end of file