diff --git a/1.13/transpose.py b/1.13/transpose.py
new file mode 100644
index 0000000..9ae0163
--- /dev/null
+++ b/1.13/transpose.py
@@ -0,0 +1,20 @@
+"""
+Exercise 1.13 - Transpose Matrix
+"""
+
+
+#  Copyright (c) 2021. Pascal Syma. All rights reserved.
+
+def transpose(matrix):
+    """
+    Transpose a matrix (nested list).
+    :param matrix: Input matrix
+    :return: Transposed matrix
+    """
+    return [[matrix[j][i] for j in range(len(matrix))] for i in range(len(matrix[0]))]
+
+
+if __name__ == '__main__':
+    print(f'{transpose([[1, 2, 3], [4, 5, 6]]) = }')
+    print(f'{transpose([[1, 2]]) = }')
+    print(f'{transpose([[3]]) = }')