To provide a piezoelectric vibrator which can surely make a human body sense the external incoming calls by sticking the piezoelectric elements at a thick part with a mass body fixed at the tip of a thin part of a slender elastic plate of uneven thickness and then supporting and fixing one of ends of the elastic plate where the piezoelectric elements are stuck at a proper part in a receiving device.

This piezoelectric vibrator 1 has the piezoelectric elements 3 stuck at a thick part with a mass body 2 fixed at the tip of a thin part of a slender elastic plate 4 of uneven thickness. In such a constitution, the plate 4 is supported and fixed at a proper part in a receiving device through one of ends of the plate 4 where the elements 3 of the vibrator 1 are stuck. Thus, the vibrator 1 is built in the receiving device. When the alternating voltage is applied to the vibrators 3 from the outside, the plate 4 causes the flexural oscillations of cycles accordant with the frequency of the alternating voltage. These oscillations are transmitted to the body 2 and a human body can sense an incoming call as the skin impulses via the receiving device.