To switch sound and vibration to each other only with a piezoelectric diaphragm with a simple structure, to attain strong body sensitive vibration and body sensitive sound and to facilitate to make lightweight and thin shaped.

In a piezoelectric vibrator, a piezoelectric body 12 having the same width as that of a plate spring 11 is mounted at a position including the center part of at least one of the main surface of the plate spring 11, and a notched part 13 is integrally provided with the piezoelectric body 12 on both sides of the center part of the plate spring 11 in the width direction. In such a case, the frequency of high order resonance vibration is decreased by lowering the rigidity of the center part of the plate spring 11, both of the resonance frequency for calling vibration and the resonance frequency of buzzer are combined with each other and the sufficiently strong body sensitive vibration and call sound are obtained with the simple structure by the frequency of impressed voltage.