Martin Mainer (born 31 October 1959) is a Czech artist and professor.
Mainer was born on 31 October 1959 in Havířov, Czechoslovakia. He studied Academy of Arts, Architecture and Design in Prague in 1978–1981 and Academy of Fine Arts, Prague in 1981–1985 (prof. A. Padrlík). In 1993 he received the Jindřich Chalupecký Award (the most prestigious Czech art prize). He worked in the Headlands Center for the Arts, and his paintings are, for example, in Amsterdam's Rijks Museum. Mainer participated in the IBCA 2005 in the National Gallery in Prague.
Since 1998 he has taught art at the Brno University of Technology, becoming a Professor, the highest Czech academic title, in 2005. His students include Alfred Symůnek, Jan Karpíšek, and Jan Sytař.
Mainer has two daughters, Marie and Karolína.