Patent ID: 7958897

Claim:
An ultrasonic hair treatment device comprising a vibrator having a vibration element for generating ultrasonic vibrations and a receiver facing the vibrator as to apply the ultrasonic vibrations to a bundle of hairs which is pinched between the vibrator and the receiver, characterized by that the vibration element has an oblong plate shape so as to have a plurality of resonance points arranged like a periodic lattice on a vibration face disposed in a thickness direction thereof; the vibrator has a header having an oblong plate shape and laminated on the vibration face of the vibration element; a plurality of concave portions for trapping a hair treatment agent therein is formed on a face of the header facing the receiver so as to include points corresponding to the resonance points of the vibration element; the concave portions are circular recesses, each formed at a point corresponding to each of the resonance points of the vibration element; and a reception face of the receiver facing a vibration face of the header is formed to be flat.