An inkjet recording apparatus comprising: an inkjet head which is configured to fluctuate a capacity of a pressure chamber by driving a pressure generator based on application of a driving waveform (100, 200, 300), impart a pressure for discharge to a liquid in the pressure chamber, and discharge a droplet from a nozzle; and a driving control unit which is configured to output the driving waveform (100, 200, 300) to the pressure generator, wherein the driving control unit is configured to output the driving waveform (100, 200, 300) having a plurality of driving pulses to discharge the plurality of droplets from the nozzle by fluctuating the capacity of the pressure chamber more than once and to combine the droplets with each other during flight or impact the droplets within the same pixel on a recording medium, wherein the driving waveform (100, 200, 300) has a first expansion pulse which expands the capacity of the pressure chamber for a fixed time and a first contraction pulse which is applied in synchronization with end of application of the first expansion pulse and contracts the capacity of the pressure chamber for a fixed time as the driving pulses to discharge a first droplet, wherein the driving waveform (100, 200, 300) has a second expansion pulse which expands the capacity of the pressure chamber for a fixed time as the driving pulse to discharge a second droplet, wherein the driving waveform (100, 200, 300) has a second contraction pulse which contracts the capacity of the pressure chamber for a fixed time and cancels a reverberant pressure wave vibration remaining in the pressure chamber after the second expansion pulse, at least one driving pulse to discharge the first droplet in the plurality of droplets fluctuates the capacity of the pressure chamber to excite two or more overlapping pressure waves in the pressure chamber, and a pressure wave vibration excited in the pressure chamber at the time of discharging the first droplet and a pressure wave vibration excited in the pressure chamber by rising of the first expansion pulse have a phase shift which is -0.6 AL or more and 0.6 AL or less where AL is 1/2 of an acoustic resonant period of a pressure wave in the pressure chamber, and at least one driving pulse to discharge the subsequent second droplet fluctuates the capacity of the pressure chamber to excite two or more overlapping pressure waves in the pressure chamber, and a pressure wave vibration excited in the pressure chamber at the time of discharging the second droplet and a combined vibration of a pressure wave vibration excited in the pressure chamber by rising of the second expansion pulse and the reverberant pressure wave vibration remaining in the pressure chamber by the discharge of the first droplet have a phase shift in a direction opposite to the phase shift in the discharge of the first droplet. an inkjet head which is configured to fluctuate a capacity of a pressure chamber by driving a pressure generator based on application of a driving waveform (100, 200, 300), impart a pressure for discharge to a liquid in the pressure chamber, and discharge a droplet from a nozzle; and a driving control unit which is configured to output the driving waveform (100, 200, 300) to the pressure generator, wherein the driving control unit is configured to output the driving waveform (100, 200, 300) having a plurality of driving pulses to discharge the plurality of droplets from the nozzle by fluctuating the capacity of the pressure chamber more than once and to combine the droplets with each other during flight or impact the droplets within the same pixel on a recording medium, wherein the driving waveform (100, 200, 300) has a first expansion pulse which expands the capacity of the pressure chamber for a fixed time and a first contraction pulse which is applied in synchronization with end of application of the first expansion pulse and contracts the capacity of the pressure chamber for a fixed time as the driving pulses to discharge a first droplet, wherein the driving waveform (100, 200, 300) has a second expansion pulse which expands the capacity of the pressure chamber for a fixed time as the driving pulse to discharge a second droplet, wherein the driving waveform (100, 200, 300) has a second contraction pulse which contracts the capacity of the pressure chamber for a fixed time and cancels a reverberant pressure wave vibration remaining in the pressure chamber after the second expansion pulse, at least one driving pulse to discharge the first droplet in the plurality of droplets fluctuates the capacity of the pressure chamber to excite two or more overlapping pressure waves in the pressure chamber, and a pressure wave vibration excited in the pressure chamber at the time of discharging the first droplet and a pressure wave vibration excited in the pressure chamber by rising of the first expansion pulse have a phase shift which is -0.6 AL or more and 0.6 AL or less where AL is 1/2 of an acoustic resonant period of a pressure wave in the pressure chamber, and at least one driving pulse to discharge the subsequent second droplet fluctuates the capacity of the pressure chamber to excite two or more overlapping pressure waves in the pressure chamber, and a pressure wave vibration excited in the pressure chamber at the time of discharging the second droplet and a combined vibration of a pressure wave vibration excited in the pressure chamber by rising of the second expansion pulse and the reverberant pressure wave vibration remaining in the pressure chamber by the discharge of the first droplet have a phase shift in a direction opposite to the phase shift in the discharge of the first droplet.