Ahmad Matin-Daftari, also known as Mo'in al-Dowleh (Persian: احمد متین‌دفتری; 23 January 1897[1] – 26 June 1971), was an Iranian politician.

[2][3] Ahmad Matin-Daftari was born on 23 January 1897 in Tehran to father Mirza Mahmud-Khan Ain ul-Mamalek.

[4] Matin-Daftari served as Senator in Iran's Majlis and became Prime Minister on 26 October 1939[5] with the fall of Mahmoud Jam's administration.

[5] Matin-Daftari was thrown in prison after the Anglo-Soviet invasion of Iran by the Allies in 1941 because of his German connections.

[7] His daughter was painter Leyly Matine-Daftary;[8] his son was lawyer and leader of the National Democratic Front political party, Hedayatollah Matin-Daftari [Wikidata].