Johann Christian Friedrich Hæffner (2 March 1759 in Oberschönau – 28 May 1833 in Uppsala) was a German-born Swedish composer. Hæffner received his first musical education with the Schmalkalden organist Johann Gottfried Vierling. He studied in Leipzig from 1776, and then worked as a music conductor in theatres in Frankfurt am Main and Hamburg from 1778 to 1780. He moved to Stockholm, Sweden in 1781 at the invitation of the German congregation there (Tyska kyrkan) to assume the position of organist, which he held until 1793. The same year (1781) he was employed at the Royal Theatre in Stockholm as well as conductor of the orchestra for the Stenborg theatres. In 1786 Hæffner was appointed assistant conductor of the Royal Orchestra (hovkapellet) and from 1795 to 1807 he held the post of hovkap