In accordance with an embodiment, an inkjet head comprises a pressure chamber configured to house ink; an actuator configured to be arranged corresponding to the pressure chamber; a plate configured to have a nozzle communicating with the pressure chamber; and a driving circuit configured to drive the actuator, wherein the drive circuit applies an auxiliary pulse signal which contains an expansion pulse for expanding the volume of the pressure chamber and a contraction pulse for contracting the volume of the pressure chamber in such a degree as not to eject an ink drop from the nozzle to the actuator before enabling the ink drop to be ejected from the nozzle communicating with the pressure chamber by applying the expansion pulse and the contraction pulse as a drive pulse signals.