diff --git a/easy/is_subsequence.py b/easy/is_subsequence.py
new file mode 100644
index 0000000..982bf78
--- /dev/null
+++ b/easy/is_subsequence.py
@@ -0,0 +1,11 @@
+# https://leetcode.com/problems/is-subsequence
+class Solution:
+    def isSubsequence(self, s: str, t: str) -> bool:
+        length = len(s)
+        index = 0
+        for c in t:
+            if index >= length:
+                break
+            if s[index] == c:
+                index += 1
+        return index >= length