Sviatoslav Nikolayevich Knushevitsky (also seen as Knushevitzky; 6 January 1908 [O.S. 24 December 1907] – 19 February 1963) was a Soviet-Russian classical cellist. He was particularly noted for his partnership with the violinist David Oistrakh and the pianist Lev Oborin in a renowned piano trio from 1940 until his death. After Mstislav Rostropovich and Daniil Shafran, he is spoken of as one of the pre-eminent Russian cellists of the 20th century.