A cleaning device (100) according to the present invention is constituted by including in a cleaning nozzle member (21) provided inside a cleaning tank (2): a large pipe diameter part (211) that supplies a cleaning fluid (31) pressure fed from a retention tank (3) a small pipe diameter part (212) that increases the speed of the flow rate for the cleaning fluid (31) flowing in the large pipe diameter part a conical pipe diameter part (213) that generates a fluid that includes minute bubbles by cavitation and a guide pipe diameter part (214) for accommodating an object (5) to be cleaned. The cleaning fluid (31) is sprayed onto the entirety of the object to be cleaned (5).於本發明中,洗淨裝置(100)係在設置於洗淨槽(2)內之洗淨噴嘴構件(21)中包括如下部件而構成,並對被洗淨物(5)整體噴射洗淨液(31),上述部件係指:大管徑部(211),其供給自貯存槽(3)壓送之洗淨液(31);小管徑部(212),其對已流過上述大管徑部之洗淨液(31)之流速進行增速;圓錐狀管徑部(213),其生成包含因空穴作用而產生之微小之氣泡的流體;及導引管徑部(214),其用以收容被洗淨物(5)。1‧‧‧殼體2‧‧‧洗淨槽3‧‧‧貯存槽4‧‧‧送液泵5‧‧‧被洗淨物21‧‧‧洗淨噴嘴構件22‧‧‧固定夾具23‧‧‧洗淨液供給配管23a‧‧‧第1配管23b‧‧‧第2配管24‧‧‧排水閥25‧‧‧排水配管31‧‧‧洗淨液100‧‧‧洗淨裝置
