Bjarne Fredrik Berg Amdahl (17 August 1903 – 14 April 1968) was a Norwegian pianist, composer and orchestra conductor.

[1] Amdahl studied piano under Melvin Simonsen, composition under Arvid Kleven and conducting under Hugo Kramm.

Already when 20 years old, Amdahl was employed as orchestra conductor (kapellmester) at the Operette Theater Mayol in Kristiania (now Oslo) in 1923.

From 1940 he also had permanent assignments as a composer, pianist and organizer at the Norwegian national broadcaster NRK.

[1] He was one of Norway's most popular composers of entertainment music in the 20th century, and among his most popular music were melodies to the songs "Tango for to [no]" and "Sønnavindsvalsen" with lyrics by Alf Prøysen, and the song "Skomværvalsen" with lyrics by Erik Bye.