Munisamy Thambidurai (born 15 March 1947) is an Indian politician who served as the Deputy Speaker of the Lok Sabha and leader of All India Anna Dravida Munnetra Kazhagam (AIADMK) in the Lok Sabha, the lower house of the Indian Parliament. He had served as the Cabinet Minister of Law, Justice and Company Affairs and as the Minister of State of Surface Transport from March 1998 to April 1999. He had also served as the Deputy Speaker of the Lok Sabha from 1985 to 1989.