Julio Salvador Sagreras (1879-1942) was an Argentine guitarist and composer. He has given many radio performances during his lifetime. Guitarist, pedagogue and Argentinian composer.

His two parents were guitarists, who taught him the guitar very early. Julio Salvador Sagreras participated in concerts at the age of 6. At age 12, he studied piano and composition. He progressed quickly and became professor of guitar in Académia de Bellas Artes. In Buenos Aires, he made acquaintance with the editor Francisco Nuñez, which had published a hundred compositions of Sagreras.

In 1905 he opened his own school, Academia de Guitarra. Between 1900 and 1936, Julio Sagreras gave many concerts in concert halls and saloons, and also participated in radio releases.

Sagreras is also known for his methodical and well annotated guitar instruction series. It consists of seven books that take the student from the beginner to the advanced stage. The series is so well thought out and so incrementally progressive that it has often been said that the student can teach himself.