| 摘要 |
[Solution] There are provided a multi-layer piezoelectric element which suppresses damage or separation of an external electrode and improves durability, as well as an injection device and a fuel injection system using the multi-layer piezoelectric element. [Solution] A multi-layer piezoelectric element of the invention includes a stacked body (2) including stacked piezoelectric bodies (21) and internal electrodes (3a, 3b), a conductor layer (5a, 5b) disposed coveringly on a side surface of the stacked body (2) so as to be elongated in a stacking direction of the stacked body (2) to electrically connect with ends of the internal electrodes (3a, 3b), which are extended to the side surface of the stacked body (2), and an external electrode (4a, 4b) disposed on the conductor layer (5a, 5b), one end in the stacking direction of the external electrode (4a, 4b) being a feeding end, a bonded region of the external electrode (4a, 4b), which is bonded to the conductor layer (5a, 5b) in an area near the feeding end, being covered with a resin (13). |
