Thirisoolam (transl. Trident) is a 1979 Indian Tamil-language action film directed by K. Vijayan. The film has Sivaji Ganesan playing triple roles. It is a remake of the Kannada film Shankar Guru (1978). The film was released on 27 January 1979 and turned out to be a silver jubilee hit, running for over 175 days in theatres eventually becoming the highest grossing Tamil film at the time of its release.