Arthur Edward George Themen (born 26 November 1939) is a British jazz saxophonist and formerly orthopaedic surgeon. Critic John Fordham has described him as “an appealing presence on the British jazz circuit for over 40 years…. Originally a Dexter Gordon and Sonny Rollins disciple … Themen has proved himself remarkably attentive to the saxophone styles of subsequent generations.”

Themen was born in Manchester, England, where he was involved with the traditional jazz scene in the late 1950s as a self-taught musician, having started playing clarinet as a schoolboy at Manchester Grammar School.