Franz Schubert's Symphony No. 8 in B minor, D. 759 (sometimes renumbered as Symphony No. 7, in accordance with the revised Deutsch catalogue and the Neue Schubert-Ausgabe), commonly known as the Unfinished Symphony (), is a musical composition that Schubert started in 1822 but left with only two movements—though he lived for another six years. A scherzo, nearly completed in piano score but with only two pages orchestrated, also survives.
