However, if it is unnecessary for the fan shape of the spray to have a wide angle, the nozzle that is preferable as the fan-shaped spray nozzle 5 may comprise a lip-like orifice type paint nozzle defined by the nozzle of a commonly used type, i.e. a dome-like inside hole and an outside trench having a V-shaped cross section which crosses the dome portion formed on the end of the dome-like inside h