PURPOSE: To accomplish efficient pump driving with a small motor having limited output by reciprocating the pump piston with comversion of the motor rotation to reciprocation of a lever by a crank pin provided on the final stage gear of a gear group.

CONSTITUTION: In pump and driving sections of an atomizer, a discharge pipe 8 provided on a pump 6 is communicated to an atomizing device arranged at the upper inside of a case body while an atomizing nozzle is mounted to the atomizing device. A rotary pin 20 is interlocked with a piston 22 reciprocating in a cylinder 21 provided in the pump 6. The rotary pin 20 is so arranged that the displacement thereof from the shaft fulcrum of a lever 17 is less than that of a crank pin 16 from the shaft fulcrum to increase the power transmission to the piston 22 from the lever 17 in inverse proportion to the displacement. Thus, the rotation force of the motor 13 can be raised up to about 50 to 100 fold. When the piston 22 beings to reduce, the crank pin 16 located far from the shaft 18 of the lever 17 rotates in the direction of the arrow A. Accordingly, the boosting effect attains its highest, and a sufficient atomizing performance can be delivered with a small motor having a limited output.