Martin Petrásek (born 26 March 1966, in Ostrov) is a former Czech cross-country skier who competed from 1988 to 2001.

He earned a bronze medal in the 4 × 10 km relay at the 1989 FIS Nordic World Ski Championships and also finished 10th in the 10 km event at the 1991 championships.

Petrásek's best individual finish at the Winter Olympics was 24th in the 30 km event in 1992.

All results are sourced from the International Ski Federation (FIS).

This biographical article relating to Czech cross-country skiing is a stub.