diff --git a/merge_sort.py b/merge_sort.py
new file mode 100644
index 0000000..b9a13b5
--- /dev/null
+++ b/merge_sort.py
@@ -0,0 +1,43 @@
+def merge (left, right):
+	result = list()
+
+	while len(left) > 0 and len(right) > 0:
+		if left[0] <= right[0]:
+			result.append(left[0])
+			left = left[1:]
+		else:
+			result.append(right[0])
+			right = right[1:]
+
+	while len(left) > 0:
+		result.append(left[0])
+		left = left[1:]
+
+	while len(right) > 0:
+		result.append(right[0])
+		right = right[1:]
+
+	return result
+
+def merge_sort (items):
+	length = len(items)
+
+	if length <= 1:
+		return items
+	left = list()
+	right = list()
+
+	for i, x in enumerate(items):
+		if i < length/2:
+			left.append(x)
+		else:
+			right.append(x)
+
+	left = merge_sort(left)
+	right = merge_sort(right)
+
+	return merge(left, right)
+
+if __name__ == '__main__':
+	data = [1, 9, 3, 2, 6, 5, 7, 3]
+	print(merge_sort(data))