Kazimierz Plater (Broel-Plater) (3 March 1915, Vilna – 30 April 2004, Warsaw) was a Polish chess master. Born into an aristocratic family in Vilnius, he studied in Warsaw where he won the Warsaw County Chess Championship in 1934. After the Second World War, he participated twelve times in Polish championships (1946–1964). He was thrice Polish Champion (1949, 1956, 1957) and twice Sub-champion (1950, 1963). He represented Poland in Chess Olympiads: Plater was awarded the International Master title in 1950.