To provide a powder supply device capable of broadly spraying powder without increasing supplied energy.

An asymmetric waveform generator 102 outputs an asymmetric waveform current command v12 to an amplifier 103. The amplifier 103 outputs current i13 corresponding to the inputted asymmetric waveform current command v12 to a shaker 104. The shaker 104, when receives the current i13, moves a vibration member 105 longitudinally with a force proportional to the inputted current i13. The force applied to the vibration member 105 is transmitted to a trough 106, and the trough 106 moves longitudinally. Because a plurality of small holes are formed at the tip of the trough 106, part of the powders on the trough 106 falls through the small holes and the remaining falls from the tip. As a result, the powders are sprayed more broadly than the prior art.