A first active region is made of a piezoelectric overlaps a midsection of a pressure chamber when viewed in plan through a pressure applying surface. A second active region is made of a piezoelectric member closer than the first active region to the pressure applying surface. The second active region extends over both a peripheral section of the pressure chamber and an outer region located outside the pressure chamber when viewed in plan through the pressure applying surface. A driver controls intensity of a first electric field applied to the first active region and intensity of a second electric field applied to the second active region such that the time period over which the first active region contracts and the time period over which the second active region contracts overlap or coincide with each other. The first electric field is more intense than the second electric field.

A liquid discharge head includes a channel member and an actuator member. A plurality of individual channels each including a nozzle and a pressure chamber communicating with the nozzle, and a communicating channel communicating with the plurality of individual channels are formed in the channel member. The actuator member is arranged on a surface of the channel member and has: a plurality of actuators each overlapping with the pressure chamber of one of the plurality of individual channels in a first direction orthogonal to the surface and having a plurality of individual electrodes, a plurality of branched parts each of which connects individual electrodes, and a trunk part connecting the plurality of branched parts and provided with a contact with respect to an electric power supply part. The communicating channel has an overlapping part overlapping with the trunk part in the first direction.

According to one embodiment, a liquid ejection head, includes a piezoelectric member having grooves extending lengthwise in a first direction. The grooves separate the piezoelectric member into piezoelectric elements spaced from each other in a second direction. A connection portion of the piezoelectric member is under a portion of the grooves in a third direction and connects the piezoelectric elements to each other. Individual electrodes are on a first surface of the piezoelectric member on a first side. A common electrode is on a second surface of the piezoelectric member on a second side. Each groove has a depth on the first side that is deeper than a depth in an end portion on the second side. The depth of each groove in the end portion on the first side reaches through the piezoelectric member to a substrate.

A head chip, a liquid jet head, and a liquid jet recording apparatus each capable of suppressing short circuit between a common electrode and an individual electrode are provided. The head chip according to the present disclosure includes an actuator plate which has a first surface facing a plurality of pressure chambers containing a liquid, and a second surface facing an opposite side to the pressure chambers with respect to the first surface in a thickness direction, and in which a recessed portion is provided on at least one surface out of the first surface and the second surface, a common electrode provided to the first surface, and configured to function as a reference potential, and an individual electrode provided to the second surface which is a surface other than the first surface, and configured to generate a potential difference relative to the common electrode to generate an electric field in the actuator plate. An electrode which is one of the common electrode and the individual electrode and is provided to the one surface is provided on at least an inner surface of the recessed portion.