O-Bi, O-Ba: The End of Civilization (Polish: O-bi, o-ba: Koniec cywilizacji) is a 1985 Polish drama science fiction film written and directed by Piotr Szulkin.
Starring Jerzy Stuhr and Krystyna Janda, the film takes place in a post-apocalyptic future where humans live in an isolated vault which is falling apart. Their only grain of hope lies in a vessel known as The Ark which is said to be on its way to rescue them; however the existence of The Ark is a myth planted by the main character, whose profession is to ensure that the morale is maintained.
The film premiered in Poland on 28 January 1985. It was shown at the Polish Film Festival in Gdynia where Andrzej Kowalczyk won the prize for Best Production Design for his work on the film. The Polish DVD was released in December 2003 as part of a box set with two other Szulkin films, The War of the Worlds: Next Century and Ga-ga: Glory to the Heroes.