A cleaning apparatus for cleaning a spray gun of the type having at least one paint inlet, and a fluid outlet, the cleaning apparatus has at least one support structure, a fluid feed head (3) carried by the structure (2), and removal elements for removing at least a fraction of the fluid coming from the fluid feed head (3), the fluid feed head having at least one feed nozzle (5) defining a duct serving to be connected to the paint inlet of the spray gun. The cleaning apparatus (1) has at least two independent fluid inlets (6, 7) for feeding fluid to the feed nozzle (5), each of the inlets having a distinct discharge (6A, 7A) into the duct of the feed nozzle, one of the inlets (6) being connectable to a cleaning fluid source, and the other (7) of the inlets being connectable to a compressed air source.