Viyabari (transl. Businessman) is a 2007 Indian Tamil-language science fiction comedy film directed and produced by Sakthi Chidambaram. The film stars S. J. Suryah in a dual role as a businessman and his clone. It also stars Tamannaah, Prakash Raj, Namitha, Malavika, Vadivelu, Santhanam, Seetha, and Nassar. The musical score was composed by Deva. Cinematography was by M. V. Panneerselvam. The editor was S. Suraj Kavee.

The film was released on 11 July 2007. It opened to mostly negative reviews, and average at the box office. It is loosely based on 1996 American science fiction comedy film Multiplicity, starring Michael Keaton and Andie MacDowell.