LAMINATED PIEZOELECTRIC ELEMENT, INJECTION APPARATUS PROVIDED WITH SAME, AND FUEL INJECTION SYSTEM PROVIDED WITH SAME

There are provided a multi-layer piezoelectric element that is driven stably for a long period of time without developing cracks in a junction between a metallized layer and a lead member or a stacked body, and an injection device and a fuel injection system provided with the same. A multi-layer piezoelectric element (1) includes a stacked body (7) in which piezoelectric layers (3) and internal electrodes (5) are laminated; a metallized layer (8) disposed on a side surface of the stacked body (7), the metalized layer (8) being electrically connected to the internal electrodes (5); an external electrode member (12) disposed on the metallized layer (8), with an electrically-conductive adhesive layer (10) interposed therebetween; and a lead member (14) bonded to the external electrode member (12).