To solve problems of a hands-free microphone employing a coil and a capacitor or the like that responsiveness in the upper register is adverse, the hands-free microphone is easily affected by a temperature or humidity and also easily incur hauling.

Regarding a microphone of the present invention, a piezo-element is in tight contact with a part of the vocal cords to convert vibration of the vocal cords into voices, and the piezo-element other than a contact surface with the part of the vocal cords is covered with a case so as to prevent a hauling phenomenon. Responsiveness in the upper register is improved by using the piezo-element which is hardly affected by a temperature or humidity and reduces the mass, and frequency characteristics are more improved by a bimorph-type vibrating element of a full frequency node center supporting system comprising a vibration control piece attached to the edge of the piezo-element.