PURPOSE: A non-contact toothbrush is provided to remove various foreign materials and bacteria without a damage of teeth due to the contact between the brush and the teeth. CONSTITUTION: The toothbrush comprises: a brush body(2) on which an ultrasonic oscillator and a switch are installed; a brush head(1) which generates a sound pressure and a cavitation due to an ultrasonic vibrator, a booster and a horn; a power supply section(19) which supplies a power voltage to each component; a timer switch(13) which makes the power voltage supplied to the ultrasonic oscillator only for a set time; an ultrasonic oscillator(7) which generates an osculation frequency of an ultrasonic wave; a booster(14) which amplifies an output signal of the ultrasonic oscillator; and a horn(16) which generates a sound pressure and a cavitation in a liquid using the amplitude of the amplified ultrasonic oscillation.
