PROBLEM TO BE SOLVED: To provide a liquid injecting device that reduces depletion of water used for excision even under circumstances where it is difficult to supply clean water.SOLUTION: The liquid injecting device includes: a storage unit 40 that stores water or physiological salt solution a first supply unit 50 that supplies the water or the physiological salt solution from the storage unit 40 an injection tube 10 that injects the supplied water or the physiological salt solution a fuel battery 20 that supplies power to at least the first supply unit 50 a distillation unit 30 that distills liquid including water and impurity and extracts distilled water from the liquid using heat generated when power is generated by the fuel battery 20 and a second supply unit 52 that supplies the distilled water to the storage unit 40.COPYRIGHT: (C)2013,JPO&INPIT【課題】清潔な水の供給が困難な状況下でも切除に用いる水が枯渇することを低減する液体噴射装置を提供すること。【解決手段】液体噴射装置は、水又は生理食塩水を貯留する貯留部40と、貯留部40から水又は生理食塩水を供給する第1供給部50と、供給される水又は生理食塩水を噴射する噴射管10と、少なくとも第1供給部50に電力を供給する燃料電池20と、燃料電池20で電力を発生させるときに生ずる熱を用いて、水及び不純物を含む液体を蒸留することによって、液体から蒸留水を抽出する蒸留部30と、蒸留水を貯留部40に供給する第2供給部52と、を有する。【選択図】図1