Franz Xaver Glöggl (21 February 1764 – 16 June or July 1839) was an Austrian musician and musical entrepreneur.

[2]: 9  The violinist Karl Holz, who later played in the Schuppanzigh Quartet and became a friend and personal secretary to Beethoven, studied under Glöggl in Linz.

Beethoven asked if he could hear an equale, the characteristic funeral trombone music genre of Linz, and Glöggl arranged a performance at his house.

Beethoven wrote for him the Drei Equale für vier posaunen (WoO 30), which are for alto, tenor and bass trombones and do not call for the soprano or quart instruments.

[1] Glöggl's collection of musical instruments and manuscripts was acquired in 1824 by the Gesellschaft der Musikfreunde in Vienna, and formed the basis of what may be the oldest surviving institutional musical instrument collection, the Sammlung alter Musikinstrumente [de], which since 1938 has been held in trust by the Viennese Kunsthistorisches Museum.