Jan Maarten Heideman (born 16 June 1973 in Oldebroek, Gelderland) is a Dutch speed skater who specialises in marathon speed skating.Heideman, currently living in a small town named Gelselaar in the Achterhoek, started as an all-around speed skater, finishing in 8th position three times at the Dutch All-around Speed Skating Championships in 1994,1995 and 1996. In 1996 he won the bronze medal at the 1500 metres at the KNSB Dutch Single Distance Championships.