A fluid injection device (1) includes a fluid supply unit (411) that accommodates and supplies fluid, a fluid injection unit (301) that injects fluid supplied from the fluid supply unit, and a driving waveform generating device (402) which is equipped with at least one adjusting device (423), a one-input multiple-control parameter changing unit (821) that simultaneously changes plural control parameters for determining a fluid injection condition of the fluid injection unit on the basis of a signal from the at least one adjusting device, and a driving waveform generator (822) that generates and outputs a driving waveform of the fluid injection unit on the basis of the control parameters set by the one-input multiple-control parameter changing unit.
