Béla Balázs (Hungarian pronunciation: [ˈbeːla ˈbɒlaːʒ]) (4 August 1884, Szeged – 17 May 1949, Budapest), born Herbert Bauer, was a Hungarian-Jewish film critic, aesthete, writer and poet.
He was the son of German-born parents, adopting his nom de plume in newspaper articles written before his 1902 move to Budapest, where he studied Hungarian and German at the Eötvös Collegium.
He is perhaps best remembered as the librettist of Bluebeard's Castle which he originally wrote for his roommate Zoltán Kodály, who in turn introduced him to the eventual composer of the opera, Béla Bartók. This collaboration continued with the scenario for the ballet The Wooden Prince.
The collapse of the short-lived Hungarian Soviet Republic under Béla Kun in 1919 began a long period of exile in Vienna and Germany and, from 1933 until 1945, the Soviet Union. György Lukács, a close friend during their youth, became a bitter enemy during the ordeal of the Stalinist purges.
In Vienna he became a prolific writer of film reviews. His first book on film, Der Sichtbare Mensch (The Visible Man) (1924), helped found the German "film as a language" theory, which also exerted an influence on Sergei Eisenstein and Vsevolod Pudovkin. A popular consultant, he wrote the screenplay for G. W. Pabst's film of Die Dreigroschenoper (1931), which became the object of a scandal and lawsuit by Brecht (who admitted to not reading the script) during production.