Gustavo Reisoli Matthieu di Pian Villar (5 June 1887 – 29 November 1955) was an Italian general during World War II.

He was born in Turin in 1887 into a noble family and pursued a military career, being appointed infantry second lieutenant in the Royal Italian Army in 1907.

In May 1943, after promotion to Major General, he was given command of the XIII Army Corps, stationed in southern Sardinia, with headquarters in Nuraminis.

[1][3][2][4] After the Armistice of Cassibile he collaborated with the general staff of Brindisi in the reconstruction of the Italian armed forces, and later became head of the press office of the "Kingdom of the South".

[2][5][6] After the war, he became a member of the central committee of the Armata Italiana della Libertà ("Italian Army of Freedom"), a secret stay-behind anti-Communist organization founded in 1947 by Ettore Musco.