Mohammad Reza Mahdavi Kani (Persian: محمدرضا مهدوی کنی ‎‎, 25 August 1931 – 21 October 2014) was an Iranian cleric, writer and conservative politician who was Acting Prime Minister of Iran from 2 September until 29 October 1981. Before that, he was Minister of Interior and Minister of Justice in the cabinets of Mohammad-Ali Rajai and Mohammad-Javad Bahonar.