Sahadevan Mahadevan is a 1988 Tamil comedy film, directed by Rama Narayanan, starring Mohan and S. V. Shekhar in lead roles, with S. S. Chandran and Kovai Sarala in supporting roles. Music was composed by Shankar Ganesh.
The story is about two unemployed youths Sahadevan (Mohan) and Mahadevan (S. V. Shekhar) who become detectives to solve Kaveri (Madhuri)'s problem, who is the love interest of Sahadevan. Adiyapatham (S. S. Chandran) is a politician who is going to open a party for children. Adiyapatham is too affectionate and love with his wife Chinnamani (Kovai Sarala). Mahadevan is an unemployed youth in a village and he ran away from his three daughters of his uncle after he came to Madras (Chennai). He went Sahadevan's rental house and got a problem with house owner (S. N. Parvathy).