Doctor Siva is a 1975 Indian Tamil-language film directed and produced by A. C. Tirulokchandar.
The movie stars Sivaji Ganesan as Dr. Siva, a well-to-do, respected, and fun-loving doctor who falls in love with Geetha (played by Manjula) and they get married.
Trouble arises when Ammu enters their lives; Siva sees her as a sister, but others misunderstand the nature of their relationship. The plot involves Ammu's mysterious death, which wrongly implicates Dr. Siva, forcing him to try to clear his name.
The film features music composed by M. S. Viswanathan and lyrics written by Vaali, including the song "Malare Kurinji" set in the Charukesi raga.
The cast includes Sivaji Ganesan, Manjula, V. K. Ramasamy, and Major Sundarrajan.