Sakari Kuosmanen (born 1956) is a renowned Finnish actor, widely recognized for his frequent collaborations with director Aki Kaurismäki.

His most celebrated performance is arguably that of the amnesiac protagonist in *Mies vailla menneisyyttä* (The Man Without a Past, 2002), a film that earned him widespread international acclaim and became a symbol of Kaurismäki's cinema. He has appeared in numerous other works by the director, including *Le Havre* (2011) and *Toivon tuolla puolen* (The Other Side of Hope, 2017), often in key roles.

Kuosmanen is appreciated for his ability to embody laconic, resilient, and profoundly human characters, often common men or outcasts. His acting style is characterized by a subtle melancholy, an intense expressiveness in his gaze, and a remarkable ability to convey much with few gestures or words, making him an iconic face of contemporary Nordic cinema.