COMPOUND PIEZOELECTRIC BODY AND ROD-SHAPED PIEZOELECTRIC CERAMIC SINTERED BODY

PROBLEM TO BE SOLVED: To provide a compound piezoelectric body which can be easily mass- produced in an industrial method and can be manufactured at low cost. SOLUTION: This compound piezoelectric body 1 is formed into a structure, wherein a columnar piezoelectric ceramic sintered body is etched by performing an acid treatment on the pillar side surface of the sintered body to reduce the diameter of the sintered body, a plurality of rod-shaped piezoelectric ceramic sintered bodies 2a with reduced diameter are respectively fixed with a resin 3 in the state made to stand in parallel to each other at intervals to form the sintered bodies 2a into a composite body, then this composite body is vertically cut in order in the lengthwise directions of the sintered bodies 2a, whereby after the sections of the composite body are obtained, electrodes 5 are respectively formed on each of the upper and lower cut surfaces of these sections of the composite body, then an electric field is applied between both electrodes on the upper and lower cut surfaces to make the sintered bodies 2a polarize.