Ludek Čajka (November 3, 1963 - February 14, 1990) was a Czechoslovak professional ice hockey defenceman. Čajka was drafted 115th overall by the New York Rangers in the 1987 NHL Entry Draft but never played in North America. He played in the Czech Extraliga for TJ Gottwaldov, HC Dukla Jihlava and HC Zlín (formerly Gottwaldov). He also represented Czechoslovakia in the 1987 World Ice Hockey Championships, winning a bronze medal.