Liquid discharge head

A liquid discharge head comprising:

• a surface plate having a plurality of discharge ports for discharging liquid;
• and
• a liquid discharge body having a discharge portion for supplying the liquid to the discharge ports, wherein
• the discharge portion and an opening are alternately arranged on the liquid discharge body and the liquid discharge body includes a bonding unit formed by combining two piezoelectric material plates, and
• each of the piezoelectric material plates is provided with a plurality of grooves on a first surface and has a first electrode on one side wall surface and the bottom of at least one of the grooves of the piezoelectric material plate, a second electrode on the other side wall surface of the at least one of the grooves of the piezoelectric material plate, and a third electrode on a second surface which is a rear surface opposite to the first surface of the piezoelectric material plate, each of the piezoelectric material plates is polarized in a direction connecting the first electrode and the second electrode and also in a direction connecting the first electrode and the third electrode, and the two piezoelectric material plates are bonded so that the first surfaces face each other to form the bonding unit.