The United Kingdom general election of 1979 was held on 3 May 1979 to elect 635 members to the British House of Commons. The Conservative Party, led by Margaret Thatcher ousted the incumbent Labour government of James Callaghan with a parliamentary majority of 44 seats. The election was the first of four consecutive election victories for the Conservative Party, and Thatcher became the United Kingdom's and Europe's first female head of government.