Mohammad Sanusi Hardjadinata (born as Samaun; 24 June 1914 – 12 December 1995) was an Indonesian politician who served as the second chairman of the Indonesian Democratic Party (PDI) from 1975 until 1980. Prior to serving as party chairman, held numerous positions during the presidencies of Sukarno and Suharto, including as governor of West Java, member of the Constitutional Assembly, and cabinet minister in the Djuanda and Ampera cabinets.