Árni Björnsson studied with Páll Ísólfsson and at the Reykjavík College of Music from 1930 to 1935. He went to Manchester, England for further flute studies from 1944-1946 with secondary emphasis on piano and composition. Upon Árni´s return to Iceland he taught at the Reykjavík College of Music, played in the Iceland Symphony Orchestra and accompanied other musicians besides working on his compositions. Árni was a prolific composer. Among his works are many choral pieces and songs, works for brass band, orchestra and chamber groups. In 1952 Árni Björnsson was assaulted and never recovered.