Jaroslav Ježek (Czech pronunciation: [ˈjaroslaf ˈjɛʒɛk]) (September 25, 1906 – January 1, 1942) was a Czechoslovakian composer, pianist and conductor, author of jazz, classical, incidental and film music.
Ježek was born in the Prague quarter of Žižkov to the family of a tailor. He was almost blind from a young age. He studied composition at the Prague Conservatory as a pupil of Karel Boleslav Jirák (1924–1927), at the master school of composition with Josef Suk (1927–1930), and shortly also with Alois Hába (1927–1928). Ježek met the playwrights/comedians Jan Werich and Jiří Voskovec (aka George Voskovec), leaders of the Osvobozené divadlo (Prague Liberated Theatre) in Prague, and took up the post of main composer and conductor for the theatre. During the next decade (from 1928 to 1939), he composed incidental music, songs, dances, and ballets for the comic and satirical plays of Voskovec and Werich. In 1934 he became a member of Czech Group of Surrealists. Forced to leave Czechoslovakia following the Nazi occupation, Ježek, Voskovec and Werich went into exile in New York City. He worked as a piano teacher and choirmaster there, and continued to work with Voskovec and Werich. In 1942, the long-ill Ježek died of chronic kidney disease in New York. On December 29, 1941, two days before his death, Ježek married Frances Bečáková.