PURPOSE: To select a desired condition from plural coating conditions of previously set discharge and spray pattern width and to change it without impairing atomizing performance and operability.

CONSTITUTION: In a compressed air route 6 for supplying driving force to an airless pump 3, plural sets each consisting of an air pressure regulating valve 7 and a flow passage switch 9 for switching by a signal from the outside corresponding thereto are installed. And also in a compressed air feeding route 17 for feeding atomizing and patterning air to a manual spray gun 2, plural sets each consisting of a separate air pressure regulating valve 18 and a flow passage switch 20 for switching by a signal from the outside corresponding thereto are installed. A controller 29 for setting secondary air pressure corresponding to desired coating material forcibly feeding pressure and atomizing and patterning assist air pressure and sending a switching signal to the corresponding flow passage switch is connected to each air pressure regulating valve, and also a handy switch 27 for selecting a flow passage switch for the controller and switching between flow passages is attached on the manual spray gun.