An atomizer (2) with a rotary atomizing head (4) is mounted on the front side of a housing member (6) in which an air motor (3) is accommodated. A primary external electrode (8) is located around the outer peripheral side of the housing member (6) in such a way as to encircle the housing member (6). A secondary external electrode (10) is located on the front side of the housing member (6), in a position closer to the rotary atomizing head (4) than the primary external electrode (8). A first high voltage (V1) in the form of a direct-current voltage is supplied to the primary external electrode (8) from a first high voltage generator (11). On the other hand, a second high voltage (V2), in the form of a pulsating voltage (V2p) consisting of a series of intermittent pulses in a range lower than the first high voltage (V1), is supplied to the secondary external electrode (10) from a second high voltage generator (12).