Iru Vallavargal () is a 1966 Indian Tamil-language action thriller film, directed by K. V. Srinivasan, produced by Modern Theatres and written by K. Devarajan. The film stars Jaishankar and R. S. Manohar, with L. Vijayalakshmi, S. A. Ashokan, C. Vasantha, Thangavelu and Manorama in supporting roles. It is a remake of the 1959 Hindi film Do Ustad. The film was released on 25 February 1966.
Music was composed by Vedha and lyrics were written by Kannadasan.
T. M. Ramachandran of Sport and Pastime called the film "mediocre". Kalki also gave a negative review.