Jan Maarten Heideman (born 16 June 1973) 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. However, at the age of six he already skated 25 kilometres in one day at the .