A liquid jet head, comprising: an actuator substrate comprising: a plurality of grooves, which are arranged in parallel in a surface of the actuator substrate ranging from a front end thereof to a vicinity of a rear end thereof while being spaced apart from one another through an intermediation of partition walls; drive electrodes, which are arranged on side surfaces of each of the partition walls; and electrode terminals (10a, 10b), which are electrically connected to the drive electrodes and arranged on the surface of the actuator substrate in the vicinity of the rear end thereof; a cover plate, which is bonded to the surface of the actuator substrate and closes upper openings of the plurality of grooves to form a plurality of channels; and a flexible substrate, which is bonded to the surface of the actuator substrate in the vicinity of the rear end thereof, and comprises wiring electrodes (11a, 11b) electrically connected to the electrode terminals, wherein the plurality of channels comprise: discharge channels (C1-Cn) for discharging liquid; and dummy channels (D1- Dn+1) that do not discharge the liquid, the discharge channels and the dummy channels being arranged alternately with each other, wherein the electrode terminals comprise: first electrode terminals, which are each electrically connected to two drive electrodes respectively arranged on a side surface on the discharge channel side of the two partition walls constituting a said discharge channel; and second electrode terminals, which are each electrically connected to two drive electrodes respectively arranged on a side surface on the dummy channel (D1, D2) side of the two partition walls constituting the said discharge channel, and wherein the wiring electrodes comprise: a common wiring electrode on the flexible substrate, which electrically connects the first electrode terminal corresponding to the discharge channel and another first electrode terminal corresponding to another discharge channel; and a plurality of individual wiring electrodes on the flexible substrate, which are electrically and individually connected to the second electrode terminals corresponding to the discharge channel and the another discharge channel, wherein, in each of the discharge channel and the another discharge channel, a first connection point, at which the first electrode terminal is electrically connected to the common wiring electrode, is situated closer to the front end than a second connection point, at which the second electrode terminal is electrically connected to one of the plurality of individual wiring electrodes, and wherein the first connection point and the second connection point are opposed to each other along a longitudinal direction of the discharge channel. an actuator substrate comprising: a plurality of grooves, which are arranged in parallel in a surface of the actuator substrate ranging from a front end thereof to a vicinity of a rear end thereof while being spaced apart from one another through an intermediation of partition walls; drive electrodes, which are arranged on side surfaces of each of the partition walls; and electrode terminals (10a, 10b), which are electrically connected to the drive electrodes and arranged on the surface of the actuator substrate in the vicinity of the rear end thereof; a plurality of grooves, which are arranged in parallel in a surface of the actuator substrate ranging from a front end thereof to a vicinity of a rear end thereof while being spaced apart from one another through an intermediation of partition walls; drive electrodes, which are arranged on side surfaces of each of the partition walls; and electrode terminals (10a, 10b), which are electrically connected to the drive electrodes and arranged on the surface of the actuator substrate in the vicinity of the rear end thereof; a cover plate, which is bonded to the surface of the actuator substrate and closes upper openings of the plurality of grooves to form a plurality of channels; and a flexible substrate, which is bonded to the surface of the actuator substrate in the vicinity of the rear end thereof, and comprises wiring electrodes (11a, 11b) electrically connected to the electrode terminals, discharge channels (C1-Cn) for discharging liquid; and dummy channels (D1- Dn+1) that do not discharge the liquid, first electrode terminals, which are each electrically connected to two drive electrodes respectively arranged on a side surface on the discharge channel side of the two partition walls constituting a said discharge channel; and second electrode terminals, which are each electrically connected to two drive electrodes respectively arranged on a side surface on the dummy channel (D1, D2) side of the two partition walls constituting the said discharge channel, and a common wiring electrode on the flexible substrate, which electrically connects the first electrode terminal corresponding to the discharge channel and another first electrode terminal corresponding to another discharge channel; and a plurality of individual wiring electrodes on the flexible substrate, which are electrically and individually connected to the second electrode terminals corresponding to the discharge channel and the another discharge channel,