PROBLEM TO BE SOLVED: To realize a more safety and highly reliable fluid injection device.SOLUTION: A fluid injection device comprises: a fluid container having a fluid storage section storing fluid and a fluid outlet formed on the fluid storage section； a fluid pressing section pressing the fluid storage section and causing the fluid to outflow from the fluid outlet； connection piping having one end connected to the fluid outlet； a fluid injection section having a fluid intake port connected with the other end of the connection piping and injecting the fluid taken in from the fluid intake port in a pulsed manner； a flow passage open/close section opening and closing a flow passage in the connection piping； a pressure detection section detecting a pressure when the fluid pressing section presses the fluid storage section and outputting a detection signal of a level corresponding to the pressure； and a control section determining a failure of the pressure detection section depending on whether or not a period of time required from timing when the pressure being obtained by causing the fluid pressing section to press the fluid storage section in a state of the flow passage being closed by the flow passage open/close section and being indicated by the detection signal is equal to a first determination value or more until timing when the pressure is a second determination value is equal to a predetermined period of time or more.【課題】より安全で信頼性の高い流体噴射装置を実現する。【解決手段】流体を収容する流体収容部と流体収容部に形成される流体出口とを有する流体容器と、流体収容部を押圧して流体出口から流体を流出させる流体押圧部と、一端が流体出口に接続される接続配管と、接続配管の他端が接続される流体取入口を有し流体取入口から取り入れた流体をパルス状に噴射する流体噴射部と、接続配管内の流体の流路を開閉する流路開閉部と、流体押圧部が流体収容部を押圧する際の圧力を検知し、圧力に応じたレベルの検知信号を出力する圧力検知部と、流路開閉部に流路を閉塞させた状態で流体押圧部に流体収容部を押圧させ検知信号により示される圧力が第１判定値以上となってから第２判定値になるまでに要する時間が所定の判定時間以上であるか否かに応じて圧力検知部の故障を判定する制御部と、を備えることを特徴とする流体噴射装置。【選択図】図７
