A liquid injection device includes: a chamber to which the liquid to be injected is supplied and the injection nozzle is connected； a pump that pumps the liquid into the chamber； a volume varying unit that varies the volume of the chamber by being deformed according to a drive voltage applied thereto； and a drive voltage applying unit that applies the drive voltage having a predetermined voltage waveform to the volume varying unit in a state in which the liquid is supplied to the chamber, wherein the pump is a unit that pumps the liquid to the chamber in a state involving the pressure variations, and the drive voltage applying unit is a unit that applies the drive voltage to the volume varying unit while compensating the influence applied by the pressure variations of the pumped to the chamber on injection by varying the voltage waveform of the drive voltage.
