The Opposition House Leader, officially known as Leader of the Official Opposition in the House of Commons of Canada, is a member of the Official Opposition, not to be confused with the Leader of the Official Opposition, but is generally a senior member of the frontbench. The House Leader is responsible for questioning the Government House Leader on the forthcoming business of the House of Commons, negotiating with the Government House Leader and other parties' house leaders on the progress of business in the House, and managing the Official Opposition's business in the House of Commons.

The leader of the Official Opposition, formally known as the leader of His Majesty's Loyal Opposition, is the politician who leads the Official Opposition in Canada, typically the leader of the party possessing the most seats in the House of Commons that is not the governing party or part of the governing coalition.