PIEZOELECTRIC MULTILAYER BODY

This invention provides a piezoelectric laminate body that limits, to a minimum, the difference of the quantity of displacement occurring in the boundary between an electrode center portion of a unit laminate body and its alternate electrode portions upon the application of an electric field, by improving a laminate structure of alternate electrode structure type unit laminate bodies. Each piezoelectric device sheet 11a of the unit laminate bodies 10a constituting this piezoelectric laminate body integrally includes a device sheet portion 11c and each lug portion 11d, 11f, and is made of a piezoelectric ceramic material. An electrode layer 11b is so formed as to extend to the surface of the device sheet portion 11c and the surface of the lug portion 11e. Among the laminate sheets 11, the electrode layer 11b of a lower laminate sheet 11 overlaps with the back of an upper laminate sheet 11. Each unit laminate body 10a is laminated serially in such a fashion that the positions of the uppermost unit laminate body to the lowermost unit laminate body 10a are deviated at 90 degrees in a direction orthogonal to the laminating direction.