LIQUID EJECTION HEAD, LIQUID EJECTING APPARATUS, AND PIEZOELECTRIC DEVICE

A liquid ejection head includes a pressure chamber in which liquid is stored, a diaphragm constituting a wall surface of the pressure chamber, and a piezoelectric device configured to vibrate the diaphragm, wherein the piezoelectric device includes a first electrode, a piezoelectric layer, a second electrode, a first wire electrically connected to the second electrode, and an insulating layer, and the piezoelectric device has a first laminate region in which the first electrode, the piezoelectric layer, and the second electrode are stacked in this order, and a second laminate region which is located on a side adjacent to the first end of the piezoelectric layer and in which the first electrode, the piezoelectric layer, the insulating layer, and the first wire are stacked in this order, and the pressure chamber has a first end at which the wall surface of the pressure chamber adjacent to the first end of the piezoelectric layer and the diaphragm intersect with each other, and the first end of the pressure chamber overlaps the second laminate region in plan view.