Abstract: To provide a multi-layer piezoelectric element having high strength against breakage, high insulation and excellent displacement performance, and an injection apparatus that incorporates the same. The multi-layer piezoelectric element comprising a stack 4 constituted from a plurality of piezoelectric layers 1 stacked one on another via internal electrode layers 2, wherein at least a part of peripheral areas 31, that are disposed between two piezoelectric layers 1, 1 located adjacently in the stacking direction and are located between an edge 2a of the internal electrode layer 2 and side face 4a of the stack 4, is dispersed areas where a plurality of metallic regions are dispersed via voids 21.

Abstract: To provide a multi-layer piezoelectric element having high strength against breakage, high insulation and excellent displacement performance, and an injection apparatus that incorporates the same. The multi-layer piezoelectric element comprising a stack 4 constituted from a plurality of piezoelectric layers 1 stacked one on another via internal electrode layers 2, wherein at least a part of peripheral areas 31, that are disposed between two piezoelectric layers 1, 1 located adjacently in the stacking direction and are located between an edge 2a of the internal electrode layer 2 and side face 4a of the stack 4, is disperse areas where a plurality of metallic regions are dispersed via voids 21.