Teo Usuelli ( 13 December 1920 – 13 April 2009) was an Italian composer. Born in Reggio Emilia in 1920, he studied music at the Giuseppe Verdi Conservatory in Milan, where he was graduated in choral music and composition. During the Second World War, he had fought with the Italian partisans, then he moved to Rome, where he began his career as composer. His other film scores include I grandi condottieri (1965), Agente S 03: Operazione Atlantide (1965), The Seventh Floor (1967), Strogoff (1970), Il prato macchiato di rosso (1973), and Il solco di pesca (1976).