Marek Sebastian Leśniak (born 29 February 1964) is a Polish former professional footballer who played as a striker.

[1] A prolific goalscorer, he was successful in his country in the 1980s, and then had a career in Germany which spanned nearly 20 years, broken by a half-year stint in Switzerland.

He started his professional career with Pogoń Szczecin, topping the Ekstraklasa goal charts in 1986–87, for a final runner-up position.

In 1988, he moved abroad, with German side Bayer Leverkusen, starting his stint of well by scoring three Bundesliga goals in his first six games.

After a couple of solid seasons, Leśniak lost his importance in the side after the arrival of Ulf Kirsten, eventually leaving in 1992 to SG Wattenscheid 09, totalling 25 goals in three seasons.