The Malayan Peoples' Socialist Front (Malay: Fron Sosialis Rakyat Malaya) or better known as Socialist Front (SF) was a left-wing coalition of Malaysian socialist parties. It was among the longest-standing opposition coalitions in Malaysian general election history. The coalition was formed by Partai Rakyat (PRM) and the Labour Party of Malaya on Hari Merdeka in 1957. In 1964, National Convention Party (NCP) joined the coalition. PRM left the coalition in 1965 and NCP soon become inactive. The Labour Party, the only remaining party in SF, abandoned it on 10 January 1966 and reverted to its own banner.