diff --git a/algorithms/search/sentinel_search.py b/algorithms/search/sentinel_search.py
new file mode 100644
index 000000000..5a5243300
--- /dev/null
+++ b/algorithms/search/sentinel_search.py
@@ -0,0 +1,19 @@
+def SentinelSearch(arr, len, target):
+ 
+    # Get last element of the array
+    lastEle = arr[len - 1]
+ 
+    # Element to be searched is placed at the last index known as "Sentinel"
+    arr[len - 1] = target
+    i = 0
+    # Traverse through array 
+    while (arr[i] != target):
+        i += 1
+ 
+    # Put the last element back
+    arr[len - 1] = lastEle
+ 
+    if ((i < len - 1) or (arr[len - 1] == target)):
+        return i
+    else:
+        return -1