Joanna Chmielewska is the pen name of Irena Kühn (born 2 April 1932 in Warsaw), a Polish writer and screenplay author. Her work is often described as "ironic detective stories". Her novels, which have been translated into at least nine languages, have sold more than 6 million copies in Poland and over 10 million in Russia.

Joanna Chmielewska graduated as an architect in 1954 from Warsaw University of Technology, and worked as a designer before devoting herself to writing. Her first short story was published in the magazine Kultura i Życie (Culture and Life) in 1958 and her first novel, Klin (The Wedge), in 1964. She loves horse races and gambling: both hobbies have been mentioned extensively in her books. She is also a connoisseur of amber, a passion which form the basis for her 1998 novel Złota mucha (The Golden Fly).

To date, she has written more than fifty novels. Most frequently, the protagonist is a woman called Joanna that inherits many characteristics from Chmielewska herself. She also often writes about Joanna's friends like Alicja (We Are All Suspects, All in Red), co-workers (We Are All Suspects, Wild Protein) or family (The Forefathers' Wells, Bad Luck).