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).
In 1949, he took 7th in Bucharest (Ludek Pachman won).
In 1957, he shared 4th in Szczawno Zdrój at the 2nd Przepiórka Memorial won by Efim Geller .He represented Poland in Chess Olympiads:
In 1952, at third board in 10th Chess Olympiad in Helsinki (+2 –3 =8);
In 1956, at second board in 12th Chess Olympiad in Moscow (+3 –6 =4);
In 1960, at second board in 14th Chess Olympiad in Leipzig (+2 –4 =3).Plater was awarded the International Master title in 1950.