Pierre Blais (born December 30 1948) is a Canadian jurist and former politician and Cabinet minister. A lawyer by training, Blais entered the Canadian House of Commons as the Progressive Conservative MP for Bellechasse, Quebec through the 1984 Canadian election. In 1987, Prime Minister Brian Mulroney appointed Blais to Cabinet as Minister of State for agriculture. Two years later he was promoted to the position of Solicitor-General. In 1990 he became Minister of Consumer and Corporate Affairs and, in 1993, was promoted by Mulroney to the position of Minister of Justice. Blais retained this position, and added the position of President of the Queen's Privy Council for Canada when Kim Campbell succeeded Mulroney as Prime Minister. Blais' political career came to an end when he was defeated, along with the Campbell government, in the 1993 Canadian election. A member of both the Quebec and Ontario bar, Blais was appointed a Justice of the Federal Court of Canada, Trial Division, an ex officio member of the Court of Appeal and Judge of the Court Martial Appeal Court of Canada in June 1998.

Through 2004, Blais presided over hearings related to Ernst Zundel's detention under a National Security Certificate. In February 2005 he ruled that the security certificate was valid and that the government could deport Zundel immediately.