A piezoelectric vibration element, comprising: a plurality of first internal electrode layers, a plurality of second internal electrode layers and a plurality of third internal electrode layers; and a plurality of piezoelectric layers, the plurality of first internal electrode layers, the plurality of second internal electrode layers (22, the plurality of third internal electrode layers and the plurality of piezoelectric layers being stacked along a first direction (z) to form a stacked body having two main surfaces, wherein the piezoelectric vibration element is configured to vibrate in bending mode in the first direction (z) with an amplitude that varies along a second direction (x) perpendicular to the first direction (z) according to input of an electric signal, characterized in that the piezoelectric vibration element further comprises: first, second and third surface electrodes (31, 32, 33) disposed on each of the two main surfaces of the stacked body, and a first, a second and a third connection electrode (41, 42), wherein the plurality of first internal electrode layers are connected to the first surface electrodes through the first connection electrode, the plurality of second internal electrode layers are connected to the second surface electrodes through the second connection electrode, and the plurality of third internal electrode layers are connected to the third surface electrodes through the third connection electrode, wherein one of the two main surfaces with the first, second and third surface electrodes (31, 32, 33) disposed thereon has such a shape that a central portion thereof in a third direction (y) perpendicular to the first direction (z) and the second direction (x) protrudes in the first direction (z) as compared with opposite end portions thereof in the third direction (y), and wherein a protrusion amount in the first direction (z) of the central portion as compared with the opposite end portions in the third direction (y) is set to 7% to 30% of the thickness in the first direction (z) of the piezoelectric vibration element. a plurality of first internal electrode layers, a plurality of second internal electrode layers and a plurality of third internal electrode layers; and a plurality of piezoelectric layers, the plurality of first internal electrode layers, the plurality of second internal electrode layers (22, the plurality of third internal electrode layers and the plurality of piezoelectric layers being stacked along a first direction (z) to form a stacked body having two main surfaces, wherein the piezoelectric vibration element is configured to vibrate in bending mode in the first direction (z) with an amplitude that varies along a second direction (x) perpendicular to the first direction (z) according to input of an electric signal, characterized in that the piezoelectric vibration element further comprises: first, second and third surface electrodes (31, 32, 33) disposed on each of the two main surfaces of the stacked body, and a first, a second and a third connection electrode (41, 42), wherein the plurality of first internal electrode layers are connected to the first surface electrodes through the first connection electrode, the plurality of second internal electrode layers are connected to the second surface electrodes through the second connection electrode, and the plurality of third internal electrode layers are connected to the third surface electrodes through the third connection electrode, wherein one of the two main surfaces with the first, second and third surface electrodes (31, 32, 33) disposed thereon has such a shape that a central portion thereof in a third direction (y) perpendicular to the first direction (z) and the second direction (x) protrudes in the first direction (z) as compared with opposite end portions thereof in the third direction (y), and wherein a protrusion amount in the first direction (z) of the central portion as compared with the opposite end portions in the third direction (y) is set to 7% to 30% of the thickness in the first direction (z) of the piezoelectric vibration element. first, second and third surface electrodes (31, 32, 33) disposed on each of the two main surfaces of the stacked body, and a first, a second and a third connection electrode (41, 42), wherein the plurality of first internal electrode layers are connected to the first surface electrodes through the first connection electrode, the plurality of second internal electrode layers are connected to the second surface electrodes through the second connection electrode, and the plurality of third internal electrode layers are connected to the third surface electrodes through the third connection electrode, wherein one of the two main surfaces with the first, second and third surface electrodes (31, 32, 33) disposed thereon has such a shape that a central portion thereof in a third direction (y) perpendicular to the first direction (z) and the second direction (x) protrudes in the first direction (z) as compared with opposite end portions thereof in the third direction (y), and wherein a protrusion amount in the first direction (z) of the central portion as compared with the opposite end portions in the third direction (y) is set to 7% to 30% of the thickness in the first direction (z) of the piezoelectric vibration element.