The 17th Canadian Parliament was in session from 8 September 1930, until 14 August 1935. The membership was set by the 1930 federal election on 28 July 1930, and it changed only somewhat due to resignations and by-elections until it was dissolved prior to the 1935 election. It was controlled by a Conservative Party majority under Prime Minister Richard Bedford Bennett and the 15th Canadian Ministry. The Official Opposition was the Liberal Party, led by William Lyon Mackenzie King. It was the third longest parliament in Canadian history. There were six sessions of the 17th Parliament: