Social Labour Party

The Social Labour Party (Partido Social Trabalhista, PST) was a political party in Brazil.

The PST was founded by dissidents of the Brazilian Labor Party in 1947. Abolished by the military regime in 1965, it was re-organized in 1988 before merging with another party to form the Progressive Party (PP) in 1993. It was finally recreated in 1996, and co-operated electorally with the small Liberal Party until 2003.

At the legislative elections held on 6 October 2002, the party won 3 out of 513 seats in the Chamber of Deputies and no seats in the Senate.