M. Krishnan Nair (2 November 1926 – 10 May 2001) was an Indian film director of Malayalam films. He directed over 100 films. He also directed 18 Tamil movie including four films starring M. G. Ramachandran and two Telugu movies, one each with superstars N. T. Rama Rao and Krishna Eminent filmmakers including Hariharan, K. Madhu, S. P. Muthuraman, Bharathiraja and Joshiy apprenticed under him as assistant directors.