Khieu Chum (Khmer: ខៀវ ជុំ Khmer pronunciation: [kʰiəw cum], 1907-1975) was a prominent Cambodian Buddhist monk and activist who was a member of a small group of people responsible for planning the Cambodian coup of 1970 which overthrew the monarchy and placed General Lon Nol as leader of a new Khmer Republic. Chum was a student of Hem Chieu, a leading figure in the early period of modern Khmer nationalism.