Norwegian novelist, dramatist, essayist, and poet whose work was generally inspired by a sense of outrage at the misuse of power in the modern world. At the beginning of the 21st century, he was considered to be one of Norway's more significant postwar writers.

Bjørneboe began his literary career with Dikt (1951; “Poems”), and he subsequently published two more verse collections, Ariadne (1953) and Den store by (1958; “The Big City”). These were notable for their restraint and classical formality and were barely expressive of the rebellious indignation that marked his early novels, such as Før hanen galer (1952; “Before the Cock Crows”), in part about Nazi medical experiments in the concentration camps, and Jonas (1955; The Least of These), about the failings of the Norwegian school system.

After writing several novels, Bjørneboe produced a trilogy: Frihetens øyeblikk (1966; Moment of Freedom: The Heiligenberg Manuscript), probably his best novel; Kruttårnet (1969; “The Gunpowder Tower”; Eng. trans. The Powderhouse); and Stillheten (1973; The Silence). These books trace “bestiality's history”—that is, they recount instances of increasing violence on the part of the state against the powerless. His last novel, Haiene (1974; The Sharks: The History of a Crew and a Shipwreck), an allegorical sea novel about a ship's final voyage, is considered to be one of his strongest works.

Bjørneboe's plays, not generally well regarded in Norway though they have been well received in other countries, show the influence of Bertolt Brecht (Brecht, Bertolt). The Norwegian prison system is criticized in the satirical musical Til lykke med dagen (1965; “Happy Birthday”), while the play Fugleelskerne (1966; The Bird Lovers) concerns the conflict between Germans and Italians, and between culpability and money, in the Italian countryside during World War II. The drama Amputasjon (1970; Amputation) parodies authority and its absolute standards for conformity.

Bjørneboe was also widely read as an essayist and journalist. An important collection of his political and newspaper articles is Politi og anarki (1972; “Police and Anarchy”). Another is the posthumously published Om Brecht (1977; “On Brecht”), about Bertolt Brecht.