An inkjet head (100, 101, 102, 103), comprising: a nozzle plate on which at least one nozzle is formed; an ink pressure chamber connected to the nozzle; an actuator configured to change a volume of the ink pressure chamber for ejecting ink from the nozzle; and an actuator driving circuit configured to supply a driving waveform to the actuator, the driving waveform including an ejection pulse portion that changes from a first voltage to a second voltage that causes the ink pressure chamber to expand and then from the second voltage to a third voltage that causes the ink pressure chamber to contract to eject ink from the nozzle, the third voltage being at a potential between a potential of the first voltage and a potential of the second voltages, a difference between the potentials of the second and third voltages being greater than a difference between the potentials of the third and first voltages, characterized in that the driving waveform includes, after the ejection pulse portion, a cancellation pulse portion that changes from the third voltage to a fourth voltage that causes the ink pressure chamber to contract and then changes from the fourth voltage to a fifth voltage that causes the ink pressure chamber to expand, and in that the third voltage and the fifth voltage are the same voltage level and the first voltage and fourth voltage are the same voltage level, wherein each of the first to fifth voltages is applied for a time Ta, the time Ta being set to a half period (λ/2) of a first natural vibration period of the actuator in a state in which the ink pressure chamber and the nozzle are filled with ink. a nozzle plate on which at least one nozzle is formed; an ink pressure chamber connected to the nozzle; an actuator configured to change a volume of the ink pressure chamber for ejecting ink from the nozzle; and an actuator driving circuit configured to supply a driving waveform to the actuator, the driving waveform including an ejection pulse portion that changes from a first voltage to a second voltage that causes the ink pressure chamber to expand and then from the second voltage to a third voltage that causes the ink pressure chamber to contract to eject ink from the nozzle, the third voltage being at a potential between a potential of the first voltage and a potential of the second voltages, a difference between the potentials of the second and third voltages being greater than a difference between the potentials of the third and first voltages, characterized in that the driving waveform includes, after the ejection pulse portion, a cancellation pulse portion that changes from the third voltage to a fourth voltage that causes the ink pressure chamber to contract and then changes from the fourth voltage to a fifth voltage that causes the ink pressure chamber to expand, and in that the third voltage and the fifth voltage are the same voltage level and the first voltage and fourth voltage are the same voltage level, wherein each of the first to fifth voltages is applied for a time Ta, the time Ta being set to a half period (λ/2) of a first natural vibration period of the actuator in a state in which the ink pressure chamber and the nozzle are filled with ink.