An inkjet head comprising: a head chip that has channels and drive walls formed of piezoelectric elements alternately arranged thereon, has a channel column having drive electrodes formed on surfaces of the drive walls facing the inside of the channels, has opening portions of the channels arranged in a front surface and a rear surface thereof, and has connection electrodes, which achieve electrical conduction with the drive electrodes in the channels, formed on the rear surface thereof; and a wiring substrate that is joined to the rear surface of the head chip so as to cover the channel column, has wiring electrodes, which are electrically connected to the connection electrodes, formed on a surface thereof joined to the head chip, and is configured to apply a voltage to the drive electrodes on the head chip through the wiring electrodes, the channel column of the head chip having drive channels from which an ink is discharged and dummy channels from which the ink is not discharged alternately arranged therein, the wiring substrate having ink supply through holes at positions associated with opening portions of the drive channels wherein the connection electrode of each dummy channel is formed so as to surround an opening portion of the dummy channel, and characterised in that the wiring substrate being joined to the rear surface of the head chip through an adhesive containing conductive particles, thereby closing the opening portion of each dummy channel, and a particle diameter of the conductive particles is equal to or less than a gap between a rear surface of the head chip and a front surface of the wiring substrate and larger than a gap between the connection electrodes on the rear surface of the head chip and the front surface of the wiring substrate. a head chip that has channels and drive walls formed of piezoelectric elements alternately arranged thereon, has a channel column having drive electrodes formed on surfaces of the drive walls facing the inside of the channels, has opening portions of the channels arranged in a front surface and a rear surface thereof, and has connection electrodes, which achieve electrical conduction with the drive electrodes in the channels, formed on the rear surface thereof; and a wiring substrate that is joined to the rear surface of the head chip so as to cover the channel column, has wiring electrodes, which are electrically connected to the connection electrodes, formed on a surface thereof joined to the head chip, and is configured to apply a voltage to the drive electrodes on the head chip through the wiring electrodes, the channel column of the head chip having drive channels from which an ink is discharged and dummy channels from which the ink is not discharged alternately arranged therein, the wiring substrate having ink supply through holes at positions associated with opening portions of the drive channels wherein the connection electrode of each dummy channel is formed so as to surround an opening portion of the dummy channel, and characterised in that the wiring substrate being joined to the rear surface of the head chip through an adhesive containing conductive particles, thereby closing the opening portion of each dummy channel, and a particle diameter of the conductive particles is equal to or less than a gap between a rear surface of the head chip and a front surface of the wiring substrate and larger than a gap between the connection electrodes on the rear surface of the head chip and the front surface of the wiring substrate.