Lal Patthar is a 1971 Hindi film, produced by F. C. Mehra, and directed by Sushil Majumdar. The film is a remake of the Bengali film, Lal Pathar, which was released in 1964. The film stars Raaj Kumar, Vinod Mehra, Hema Malini, Raakhee, Ajit, Asit Sen and Paintal. The film is one of the rare films where lead actress Hema Malini played a negative role, being a jealous mistress of a zamindar who tries to frame his young wife as an adultress. Her performance received accolades. The music of the film was composed by Shankar Jaikishan with award winning songs.
The film was shot on some minor outdoor locations and at Mehboob Studios, as well as at Natraj Studios Bombay.