Irumbu Thirai (transl. Iron Curtain) is a 1960 Indian Tamil-language film produced and directed by S. S. Vasan. The film stars Sivaji Ganesan, Vyjayanthimala, K. A. Thangavelu and B. Saroja Devi, with S. V. Ranga Rao, Pandari Bai and Vasundhara Devi in supporting roles. A remake of Vasan's own Hindi film Paigham (1959), it revolves around two brothers Manikam and Kondamuthu and their mill owner.

The soundtrack was composed by S. V. Venkatraman and the lyrics were written by Kothamangalam Subbu, Papanasam Sivan and Pattukkottai Kalyanasundaram. The editing was done by M. Umanath while the camera was handled by P. Elappa and N. C. Bala Krishna. The film was released on 14 January 1960 and ran more than 175 days in theatres.