Marek Posmyk (born September 15, 1978) is a Czech professional ice hockey defenceman currently playing for HC České Budějovice previously for HC Plzeň in the Czech Extraliga. He was drafted in the second round, 36th overall, of the 1996 NHL Entry Draft by the Toronto Maple Leafs. He was traded by the Maple Leafs to the Tampa Bay Lightning on February 9, 2000, as part of the deal which brought Darcy Tucker to Toronto.