| 摘要 |
PROBLEM TO BE SOLVED: To provide a lamination piezoelectric element in which peeling of an external electrode plate and corrosion at an end of the bonding region of the external electrode plate and a lamination is suppressed, and to provide an injector including the same, and a fuel injection system.SOLUTION: A lamination piezoelectric element 1 includes a laminate 4 of a piezoelectric layer 2 and an internal electrode layer 3, and an external electrode plate 5 bonded to the side face of the laminate 4. The external electrode plate 5 has an extension region 52 extending in the lamination direction from one end of the laminate 4. When viewed in a longitudinal section perpendicular to the bonded side face of the external electrode plate 5, a first bend 52a that is convex toward the inside is provided in the extension region 52, and the peak of the first bend 52a is located on the inside of the extension of a bonding region 51 to the laminate 4. |
