Pati Patni Aur Woh (transl. The husband, the wife and the mistress) is a 1978 Hindi movie produced and directed by B. R. Chopra. The film stars Sanjeev Kumar, Vidya Sinha, Ranjeeta Kaur, and in guest appearances Rishi Kapoor, Neetu Singh, Tina Munim and Parveen Babi.

Initially Basu Chatterjee was offered the film, than Ravi chopra was assigned, But due to busy schedule of both, finally B R chopra directed the Film. Sanjeev Kumar and Vidhya Sinha Completed the project in 30 days, as they were to keen and interested in the storyline. and for Ranjeeta kaur, it was her film after success of laila Majnu. It is said that it was made in between the ongoing shooting of The Burning Train.

The film was remade under the same name in 2019 starring Kartik Aaryan, Bhumi Pednekar and Ananya Pandey. The film was directed by Mudassar Aziz and produced by Bhushan Kumar.