Marek Jankulovski (Czech pronunciation: [ˈmarɛk ˈjaŋkulofskɪ]; born 9 May 1977) is a retired Czech footballer who played as a defender. His most notable achievements include winning the UEFA Champions League with A.C. Milan and being voted the 2007 Czech Footballer of the Year. He earned 77 caps for the Czech Republic, and represented them at three European Championships, the 2000 Olympics and the 2006 World Cup.
A quick, tenacious, and hardworking player, he was well known for his versatility, being able to play anywhere on the left side, and was used as a full-back as a wing-back and as a winger throughout his career. He was also known for his ability to cross the ball, as well as his considerable technical ability and energetic attacking runs down the left flank.