General Trần Thiện Khiêm (born 15 December 1925) is a Vietnamese military officer. He was an officer in the army of South Vietnam during the Vietnam War. During the 1960s he was involved in several coups d'état. He helped President Ngô Đình Diệm put down a coup attempt in November 1960. He was rewarded with promotion. In 1963 he was involved in the coup that deposed and assassinated Ngo Dinh Diem.