The Piano Trio in A minor, Hafträsk, JS 207, is a four-movement chamber piece for violin, cello, and piano written in the summer of 1886 by the Finnish composer Jean Sibelius. The trio derives its nickname from the small village of Hafträsk on Norrskata, an island located in the Turku archipelago, at which the Sibelius family vacationed in 1886. Immediately upon its completion, Sibelius substantially revised the first movement; this version, however, is fragmentary, although the cello part is complete.