A liquid discharge head comprising: a flow passage member formed by laminating a plurality of flat plates (4a to 4m), including a plurality of pressurizing chambers opening in a plane, a plurality of discharge holes respectively connecting with a plurality of the pressurizing chambers, and a common flow passage commonly connecting with a plurality of the pressurizing chambers; and a piezoelectric actuator substrate laminated on the plane of the flow passage member, disposed with a plurality of displacement elements, each displacement element containing at least one piezoelectric ceramic layer (21a, 21b) and a pair of electrodes disposed on each side with the piezoelectric ceramic layer interposed therebetween, wherein on an external surface of the piezoelectric actuator substrate, a plurality of connection electrodes (26, 27) to which respective driving signals of a plurality of the displacement elements are supplied are disposed, wherein the external surface of the piezoelectric actuator substrate is opposite to a surface on which the piezoelectric actuator is laminated on the flow passage member, in a region where a plurality of the pressurizing chambers are disposed, the number of the connection electrodes (26, 27) per unit area disposed in a first region that is a region not overlapping the common flow passage of the external surface, in a planar view of the liquid discharge head is greater than the number of the connection electrodes (26, 27) per unit area disposed in a second region that is a region overlapping the common flow passage of the external surface, and the connection electrodes (26, 27) disposed in the second region in a planar view of the liquid discharge head are disposed at positions closer to a lateral wall of the common flow passage than the center in the width direction of the common flow passage. a flow passage member formed by laminating a plurality of flat plates (4a to 4m), including a plurality of pressurizing chambers opening in a plane, a plurality of discharge holes respectively connecting with a plurality of the pressurizing chambers, and a common flow passage commonly connecting with a plurality of the pressurizing chambers; and a piezoelectric actuator substrate laminated on the plane of the flow passage member, disposed with a plurality of displacement elements, each displacement element containing at least one piezoelectric ceramic layer (21a, 21b) and a pair of electrodes disposed on each side with the piezoelectric ceramic layer interposed therebetween, wherein on an external surface of the piezoelectric actuator substrate, a plurality of connection electrodes (26, 27) to which respective driving signals of a plurality of the displacement elements are supplied are disposed, wherein the external surface of the piezoelectric actuator substrate is opposite to a surface on which the piezoelectric actuator is laminated on the flow passage member, in a region where a plurality of the pressurizing chambers are disposed, the number of the connection electrodes (26, 27) per unit area disposed in a first region that is a region not overlapping the common flow passage of the external surface, in a planar view of the liquid discharge head is greater than the number of the connection electrodes (26, 27) per unit area disposed in a second region that is a region overlapping the common flow passage of the external surface, and the connection electrodes (26, 27) disposed in the second region in a planar view of the liquid discharge head are disposed at positions closer to a lateral wall of the common flow passage than the center in the width direction of the common flow passage.