Mohammad Hasan Khan Qajar, also spelled Muhammad Hassan (1715–1759), chief of the Qoyunlu branch of the Qajar tribe of Turkomans in the Caspian coastlands around Astarabad, was the son of Fath-Ali Khan Qajar and the father of Hossein Qoli Khan Qajar and Agha Mohammad Khan Qajar, who founded the Qajar dynasty of Iran.