Mahmut Sadi Irmak (May 15, 1904[1] – November 11, 1990)[2] was a Turkish academic in physiology, politician and former Prime Minister of Turkey.
After completing his study, Sadi Irmak worked as an assistant physician in hospitals in Hagen and Düsseldorf, Germany.
Between June 7, 1945, and August 5, 1946, he served as minister of labor in the cabinet of Şükrü Saracoğlu, becoming the first Turkish politician to assume the post.
The same year, Sadi Irmak was commissioned by President Fahri Korutürk to form the 38th government of Turkey on November 17, 1974.
The caretaker government under his prime ministry lasted for 124 days until his resignation on March 31, 1975, when he lost a vote of no confidence in the parliament.
His daughter, Prof. Yakut Irmak Özden, is director of the Institute for Atatürk's Ideology and History of His Reforms at Istanbul University.