A dishwasher comprising: a wash tub; a wash assembly, in which water flows to wash dishes received in the wash tub; a sterilizer to produce sterilizing water; a controller to control driving of the sterilizer in a sterilization mode, for production of sterilizing water, and to control driving of the wash assembly in the _sterilization-mode; to cause the sterilizing water to circulate through an interior of the wash tub and an interior of the wash assembly; wherein the controller is arranged to stop entry into the sterilization mode when it is determined that there are dishes in the wash tub; characterized in that the dishwasher further comprises a reservoir to store a portion of the wash water; an electrolyzer disposed in the reservoir; a flow path change valve to open and close a flow passage between a water collector and the reservoir; and a circulation unit to circulate the water stored in the water collector and the reservoir into the wash chamber, wherein the controller controls the electrolyzer to electrolyze the wash water in the reservoir for production of sterilizing water, and controls the flow path change valve and the circulation unit to circulate the produced sterilizing water through an interior of the dishwasher, and wherein, after completion of a final rinsing operation executed when the dishwasher operates, the controller controls the circulation unit and the flow path change valve to store water used in the final rinsing operation in the reservoir. a wash tub; a wash assembly, in which water flows to wash dishes received in the wash tub; a sterilizer to produce sterilizing water; a controller to control driving of the sterilizer in a sterilization mode, for production of sterilizing water, and to control driving of the wash assembly in the _sterilization-mode; to cause the sterilizing water to circulate through an interior of the wash tub and an interior of the wash assembly; wherein the controller is arranged to stop entry into the sterilization mode when it is determined that there are dishes in the wash tub; characterized in that the dishwasher further comprises a reservoir to store a portion of the wash water; an electrolyzer disposed in the reservoir; a flow path change valve to open and close a flow passage between a water collector and the reservoir; and a circulation unit to circulate the water stored in the water collector and the reservoir into the wash chamber, a reservoir to store a portion of the wash water; an electrolyzer disposed in the reservoir; a flow path change valve to open and close a flow passage between a water collector and the reservoir; and a circulation unit to circulate the water stored in the water collector and the reservoir into the wash chamber, wherein the controller controls the electrolyzer to electrolyze the wash water in the reservoir for production of sterilizing water, and controls the flow path change valve and the circulation unit to circulate the produced sterilizing water through an interior of the dishwasher, and wherein, after completion of a final rinsing operation executed when the dishwasher operates, the controller controls the circulation unit and the flow path change valve to store water used in the final rinsing operation in the reservoir.