To be able to automatically clean an object to be cleaned using highly effective electrolyzed water by reducing the neutralization reaction that occurs during mixing when the generated gas is mixed with the electrolyzed water. [Solution] This automatic cleaning apparatus (1) comprises: an electrolyzed water -generating unit (8) for generating electrolyzed water by electrolyzing raw water to which an electrolyte has been added a bubble- generating unit (9) for generating bubbling electrolyzed water by forcing the electrolyzed water to comprise microbubbles using the gas generated in the electrolyzed water generating unit (8) a cleaning unit (4) for cleaning the object to be cleaned by spraying the bubbling electrolyzed water thereon and a control unit (2) for controlling the spray timing and spray volume of the bubbling electrolyzed water.
