Laminated piezoelectric actuator

A laminated piezoelectric actuator comprising:

• a plurality of electrostrictive elements stacked relative to each other, each of said elements having a structure comprising alternately laminated electrostrictive material layers and internal electrode layers, an enclosure for sealing said elements, said enclosure comprising a metallic casing with at least one metallic member fixed to an aperture in said casing, and a supporting member for stacking said plurality of electrostrictive effect elements in their longitudinally displaced direction, said supporting member having a notch formed on its opposed lateral surfaces for providing an exit for leads connected to said plurality of electrostrictive effect elements, and said supporting member comprises a plurality of blocks, each of said blocks having a length which is substantially the same as the length of a single element and having a protrusion at each of four corners of its one end surface and a hole at each of four corners of the other end surface so as to be connected to each other by sequentially fitting said protrusion to said hole of an adjacent block.