The present invention relates to a high voltage generator, and with the oscillator 12 for generating an oscillating signal having a predetermined frequency, is connected to the output terminal of the oscillator transistor being turned on / off according to the oscillation frequency signal (Q), the transistor (Q) It is connected from the oscillating frequency signal and thus the voltage to be applied is controlled by the on / off of the transistor of the oscillator 12 is configured to include the piezoelectric ceramics 20, which generate a high voltage at a predetermined level. Accordingly, the present invention, because it generates a high voltage using a piezoelectric ceramic, and can be miniaturized in size, there is an effect that it is possible to eliminate the damage of the electromagnetic waves.