PURPOSE: To provide a removing method for a deposit in a batch type electrolyzed water generator, which is capable of removing the deposit without taking in and out a generated water in an electrolytic cell, using the generated water without deteriorating the property of water quality attained by electrolysis and saving the labor of maintenance of cleaning of an electrode or the like.

CONSTITUTION: The inner part of the proper body 10 of the electrolyzed water generator is divided into two of a 1st electrolytic cell 14 and a 2nd electrolytic cell 16 by a diaphragm 12 and a 1st electrode 18 is arranged in the 1st electrolytic cell 14 and a 2nd electrode 20 is arranged in the 2nd electrolytic cell 16. The polarities of the 1st electrode 18 and the 2nd electrode 20 are controlled to be reversed respectively at the time of electrolyzing and at the time of cleaning after electrolysis. The electric power to the electrode at the time of cleaning is controlled to 1/50 to 1/10 that at the time of electrolyzing and the deposit is removed without deteriorating the feature of water quality of the generated water by reversing the polarity of electric power at the time of cleaning.