Pavel Haas (21 June 1899 – 17 October 1944) was a Czech composer who was murdered during the Holocaust. He was an exponent of Leoš Janáček's school of composition, and also utilized elements of folk music and jazz. Although his output was not large, he is notable particularly for his song cycles and string quartets.
Haas was born in Brno, into a Jewish family. His father, Zikmund, a shoemaker by trade, was from the Moravian region, while his mother, Olga (née Epstein), was born in Odessa. After studying piano privately, Haas began his more formal musical education at the age of 14 and he studied composition at the Brno Conservatory from 1919 to 1921 under Jan Kunc and Vilém Petrželka. This was followed by two years of study in the master class of the noted Czech composer Leoš Janáček. Janáček was far and away Haas's most influential teacher, and Haas, in turn, proved to be Janáček's best student. In 1935 he married Soňa Jakobson, the former wife of Russian linguist Roman Jakobson.
Of the more than 50 works Haas wrote during the next two decades, only 18 were given opus numbers by the self-critical composer. While still working in his father's business, he wrote musical works of all kinds, including symphonic and choral works, lieder, chamber music, and scores for cinema and theatre. His opera, Šarlatán (The Charlatan), was first performed in Brno to sincere acclaim in April 1938. He received the Smetana Foundation award for the opera (sharing the award with Vítězslava Kaprálová who received it for her Military Sinfonietta).