Il Cannone Guarnerius of 1743 is an antique violin fabricated by Italian luthier, Giuseppe Antonio Guarneri of Cremona (1698-1744).

Il Cannone is also known by the variants, Il Cannone del GesùCannone or Canon, often appended with Guarneri del Gesù, the Guarneri trademark. The violin received its name from a previous owner, the Italian violin virtuoso Niccolò Paganini (1782–1840), because of its power and resonance. So associated is Paganini with Il Cannone, it is very common for the violin to be referenced as Il Cannone, ex-Paganini.