To precisely discriminate a normal use state and an abnormal use state using an impedance value in an ultrasonic beauty treatment apparatus beautifying the skin surface of an organism or a target portion inside the organism using ultrasonic vibration.

This ultrasonic beauty treatment apparatus is provided with an ultrasonic vibrator 11 generating the ultrasonic vibration, an ultrasonic vibration block 10 connected to the ultrasonic vibrator 11 and constituted of a horn 12 transmitting the ultrasonic wave from the arbitrary-shape ultrasound emitting surface to the skin surface of the organism or the target portion inside the organism, and a driving circuit 13 driving the ultrasonic vibration block. The ultrasonic vibrator 11 is formed into an elliptical shape or a shape formed by composing at least two or more circles and connecting the tangents of the respective circles for approximately uniformizing vibration amplitude distribution on the ultrasound emitting surface.