Joseph Küffner (Kueffner) (31 March 1776 in Würzburg – 9 September 1856 in Würzburg) was a German musician and composer who, among other achievements, contributed significantly to the guitar repertory, including chamber music.A quintet of Küffner's for clarinet and strings was once attributed to Carl Maria von Weber, and is still recorded in collections of Weber's music. He composed seven symphonies and a large number of works for various chamber music combinations. His output also contains a substantial quantity of music for classical guitar (some of it being available in modern editions).