Inkjet head preventing erroneous ink ejection from unintended adjacent nozzles

An inkjet head comprising:

• a cavity unit formed of a conductive material with a plurality of nozzles and a plurality of pressure chambers in fluid communication with the corresponding nozzles, the plurality of pressure chambers being aligned in a predetermined direction;
• an actuator including a plurality of sheet members laminated one on the other in a lamination direction, a plurality of driving electrodes corresponding to the pressure chambers, and a plurality of common electrodes, each sheet member having a width greater than a total width of the plurality of pressure chambers with respect to the predetermined direction, the plurality of driving electrodes and the plurality of common electrodes being arranged in alternation with respect to the lamination direction, each of the driving electrodes and the common electrodes being sandwiched between corresponding sheet members, wherein portions of the sheet members sandwiched between the driving electrodes and the common electrodes serve as active portions that selectively eject ink droplets from the corresponding pressure chambers through the nozzles;
• and
• a conductive member that electrically connects the common electrodes to the cavity unit for maintaining the common electrodes at the same potential as the cavity unit, wherein
• one of the sheet members has a first surface on which one of the common electrodes is formed and a second surface opposite to the first surface, the second surface being attached to the cavity plate.