Czech writer best known for his satirical novel The Good Soldier Schweik.

Hašek worked in Prague as a bank clerk, although at 17 he was already writing satirical articles for Czech newspapers. He soon abandoned business for a literary career, and before World War I he published a volume of poetry and wrote 16 volumes of short stories, of which Dobrý voják Švejk a jiné podivné historky (1912; “Good Soldier Schweik and Other Strange Stories”) is among the best known. From 1904–07 he was an editor of anarchist publications. Drafted into the Austro-Hungarian army, Hašek was captured on the Russian front during World War I and was made a prisoner of war. While in Russia he became a member of the Czechoslovak Legion but later joined the Bolsheviks, for whom he wrote communist propaganda. Upon returning to Prague, the capital of the newly created country of Czechoslovakia, he devoted himself to writing Osudy dobrého vojáka Švejka za světové války (1921–23; The Good Soldier Schweik). It was intended to be a six-volume work, but only three were completed by the time of his death. The fourth volume was completed by Karel Vaněk.

The Good Soldier Schweik reflects the pacifist, antimilitary sentiments of post-World War I Europe. The title character is drafted into the service of Austria but does not fight in the war; instead, he serves as orderly to a drunken priest, who in a poker game loses Schweik's services to an ambitious, lecherous officer. Naive, instinctively honest, invariably incompetent, and guileless, Schweik is forever colliding with the clumsy, dehumanized military bureaucracy. His naïveté serves as a contrast to the self-importance and conniving natures of his superior officers and is the main vehicle for Hašek's mockery of authority.