Abstract: The disclosure includes a body case 11 including a grip case portion 12 provided with an inclined connection surface 14 at a tip and held by an operator, and a tip case portion 13 capable of relative rotation with respect to the grip case part 12 and incorporating a discharge nozzle 21 for discharging air; a manual valve 31 switched between an open state of discharging the air to the discharge nozzle and a closed state of stopping the discharge; and a trigger lever 34 operating the manual valve 31 between the open state and the closed state, the tip case portion 13 is switched to either a straight position of straight extending with respect to the grip case portion 12 and an inclination position inclined with respect to the grip case portion 12.