Karin Boye was a Swedish poet and novelist.

She is perhaps most famous for her poems, of which the most well-known ought to be "Yes, of course it hurts" (Swedish: "Ja visst gör det ont") and "In motion" (Swedish: "I rörelse"). She also wrote a few novels including "Kallocain". Inspired by the rise of National Socialism in Germany, it was a portrayal of a dystopian society in the vein of Orwell's Nineteen Eighty-Four and Huxley's Brave New World (though written almost a decade before Nineteen Eighty-Four). In the novel, an idealistic scientist named Leo Kall invents Kallocain, a kind of truth serum.

Boye died in an apparent suicide when swallowing sleeping-pills after leaving home on April 23, 1941.