Memoirs of a Sinner (Polish: Osobisty pamiętnik grzesznika przez niego samego spisany) is a 1986 Polish film directed by Wojciech Has, starring Piotr Bajor.

The film is an adaptation of James Hogg's The Private Memoirs and Confessions of a Justified Sinner (1824) and tells the tale of the protagonist Robert and his doppelganger.

Robert (Piotr Bajor) is exhumed from the grave by a gang of grave robbers and is forced to recount his life story - a struggle between good and evil, embodied in his doppelganger whom he eventually kills.

[3] Jerzy Maksymiuk's score won the award for Best Score at the 1986 Polish Film Festival.

Has maintains the strangeness central to the novel, although he tends to focus on the creation of unease, intrigue and beautiful images rather than Hogg's satire on Calvinist predestination.