Czech pianist, drummer (studied at Prague Conservatory 1955–1959), composer, arranger, bandleader and educator.
Born 2 June 1940 in Prague (former Czechoslovakia), died 26 September 2016 in Prague. Father of saxophonist Karel Růžička (3).
Member of the Ferdinand Havlík Orchestra / Orchestr Divadla Semafor 1960–1962 and 1964–1966, Czechoslovak Radio Jazz Orchestra / Czechoslovak Radio Dance Orchestra 1966–199?, Jazz Celula (a.k.a. Jazz Cellula) 1968–1980, SHQ 1972–1974. President of the Czech Jazz Society 1996–1997.
(Note: for the Czech lyricist, please see Karel Růžička (2).)

K. Ruzicka, K.Růžička, Karel Ruzicka, Karel Růžička & Friends, Karel Růžička Ml., Růžička, Карел Ружичка