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 a 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 ejected to the entirety of the object (5).
