Perumthachan (transl. Great carpenter) is a 1991 Indian Malayalam-language period drama film directed by Ajayan and written by M. T. Vasudevan Nair. It is based on the legend of Perumthachan in the Parayi Petta Panthirukulam folklore. The problems caused by the generation gap are explored through the relationship between a skilled carpenter and his tradition-breaking son.

The film won the National Film Award for Best First Film of a Director and Filmfare Award for Best Film - Malayalam. It was nominated for the Golden Leopard Award and is now considered as a classic in Malayalam cinema. The film marks the debut of Prashanth in Malayalam cinema.