Patent ID: 7439655

Claim:
A laminated-type piezoelectric element, comprising piezoelectric layers composed of a ceramic being expansible and contractible by an applied electric voltage, internal electrode layers which are stacked alternately with the piezoelectric layers to form the laminated-type piezoelectric element, and supply the electric voltage to the piezoelectric layers, and first external electrode layers which are disposed on side areas of the laminated-type piezoelectric element, are electrically continuous to the internal electrode layers, and comprise plural opening portions being expansible and contractible in a stacking direction of the laminated-type piezoelectric element, wherein the first external electrode layer is connected to the laminated-type piezoelectric element via an electrically conductive adhesive member which has penetrated into the plural opening portions, and a width of the electrically conductive adhesive member is narrower than a width of the first external electrode layer.