A spray gun, in particular a powder spray gun, has a handle part and a gun barrel connected to the handle part. The spray gun further includes an illumination device for continuously or optionally illuminating and/or lighting at least one region of an object to be coated by the spray gun. The illumination device is detachably and in particular exchangeably connected to the spray gun and has a ring-shaped lighting means carrier with at least one lighting means, in particular in the form of an LED. The lighting means carrier extends around a downstream region of the gun barrel, on which it is radially supported.