Onbadhu Roobai Nottu is a 2007 Tamil-language drama film directed by Thangar Bachan, based on Bachan's own same-titled novel. It depicts the tragic life and fall of Madhava Padayachi, a simple villager, played by Sathyaraj, and his family. Also starring Archana, Nassar and Rohini in supporting roles, the film was released on 30 November 2007 to high critical acclaim and was praised as one of the best movies in Tamil cinema.

Thangar Bachan is an Indian film director and actor, cinematographer and novelist. He has served as jury member in National Film Awards.