PURPOSE: To reduce a disinfection cost, to simplify a waste water treatment and to prevent the secondary infection by pathogenic bacteria via a disinfecting liquid by electrolyzing washing water contg. chloride ions to intensify the disinfecting power of the washing water and disinfecting the object to be disinfected with this washing water.

CONSTITUTION: This electrolytic disinfecting device is composed of a box-shaped device body 45 having a hand washing vessel 44 in the upper part and a supporting frame 46 projecting upward from the rear part of this device body 45. The device body 45 is internally provided with a salt water preparing means of a hermetic type and the supporting frame 46 is provided with a electrolyzing means 48 and a take-out port 49 for the washing water, respectively. The water take-out port 49 arranged in the upper central part of the hand washing vessel 44 is connected to the electrolyzing means 48 via a take-out pipe 59 in such a manner that the city water after electrolysis is taken out as the washing water at the time of opening its stop valve. Further, the electrolyzing means 48 forms the washing water contg. hypochlorous acid by electrolyzing the city water contg. the chloride ions.