PROBLEM TO BE SOLVED: To provide an art capable of jetting a pulse flow having an appropriate force just after the start of jetting.SOLUTION: A fluid jetting device for jetting fluid includes: a jetting pipe which has an opening through which the fluid is jetted； a fluid chamber which communicates with the jetting pipe and a volume of which is changed depending on displacement of a piezoelectric element； a supply flow passage which communicates with the fluid chamber； an opening/closing means which is provided in the supply passage to open/close the supply passage； a fluid supply part which pressurizes the fluid and supplies the fluid to the fluid chamber via the supply flow passage； and a voltage control part which applies a drive voltage to the piezoelectric element. The voltage control part controls the drive voltage applied to the piezoelectric element to reach a predetermined voltage after opening the supply flow passage by the opening/closing means.【課題】噴射開始の直後から、適切な勢いの脈流を噴射することのできる技術を提供する。【解決手段】流体を噴射する流体噴射装置は、流体を噴射する開口部を有する噴射管と、噴射管に連通し、圧電素子の変位により容積が変化する流体室と、流体室に連通する供給流路と、供給流路に設けられ、供給流路の開閉を行なう開閉手段と、流体を加圧し、供給流路を介して流体室に流体を供給する流体供給部と、圧電素子に駆動電圧を印加する電圧制御部とを備える。電圧制御部は、圧電素子に印加される駆動電圧が、開閉手段による供給流路の開放より後に所定の電圧に達するように制御する。【選択図】図４
