Abstract: A piezoelectric sounding body includes a metal plate, an insulating layer disposed on the top surface of the metal plate, and a piezoelectric body in which a plurality of piezoelectric ceramic layers are laminated with an internal electrode disposed therebetween and the piezoelectric ceramic layers are polarized in the thickness direction so as to be opposite to each other, the top and bottom surfaces of which external electrodes are provided, and on the bottom surface of which is bonded to the insulating layer.

Abstract: A piezoelectric electroacoustic transducer includes a substantially rectangular piezoelectric diaphragm having electrodes and flexurally vibrating in response to application of an alternating signal between the electrodes, a resin case having a supporting member disposed inside sidewalls of the case for supporting the diaphragm, terminals insert-molded in the case so as to have internal connections exposed in the supporting member and external connections exposed on the external surface of the case, a conductive adhesive for electrically connecting the electrodes of the diaphragm to the internal connections of the terminals, an elastic sealant for sealing a gap between the external periphery of the diaphragm and the internal periphery of the case, and a lid plate for closing an opening of the case.