Michael Fraser Weir (born 24 March 1957) is a Scottish National Party (SNP) politician who served as Member of Parliament (MP) for Angus in Scotland from 2001 to 2017 when he lost his seat to the Conservative Party. He served as the SNP Chief Whip in the House of Commons. Weir used to be a councillor and Convenor of the General Purposes Committee of Angus District Council. Prior to his election in 2001, he was a solicitor and Partner for J&DG Shiell in Brechin.