A spray comprises a piezoelectric device (50) having interdigital comb-shaped electrodes formed on one surface thereof; a mesh member (40) having a large number of small holes and located near the portion of the piezoelectric element (50), where no electrode is formed; a chemical bottle (20) containing a liquid (L); and a solenoid (26) for supplying the liquid (L) between the piezoelectric device (50) and the mesh member (40). Vibratory waves of the piezoelectric device (50) produced by an oscillation circuit are bulk waves passing through the interior of the piezoelectric device, other than the surface waves passing over the surface of the piezoelectric device and determined by the comb-shaped electrode pitch. Therefore, the spraying efficiency is improved and the atomization is stabilized.
