Kaaki Sattai (transl. Khaki shirt) is a 2015 Indian Tamil-language action film co-written and directed by R. S. Durai Senthilkumar and produced by Dhanush, their second collaboration after Ethir Neechal (2013). The film stars Sivakarthikeyan and Sri Divya, Vijay Raaz and Prabhu. The film's music was composed by Anirudh Ravichander. The story revolves around police constable Mathimaran who wants to prove himself as a true, powerful cop by finding ways to solve issues of corruption in the law and order system in the department of police.

The film, which commenced filming in April 2014, released on 27 February 2015, to mostly positive reviews and became a box office success.