In order to solve this problem, the present invention provides endoscope disinfection apparatus that continuously generates endogenous disinfection by continuously generating hypochlorous acid water for disinfecting the endoscope, and at the same time, the structure is very simple to realize low cost. There is a problem. The present invention to solve this problem Disinfection tank 300 for storing hypochlorous acid water having a concentration of 3 to 200ppm to disinfect the endoscope, A drain pipe 400 including a recovery pipe 410 for introducing the solution stored in the disinfection tank 300 into the hypochlorous acid generator 800 and a discharge pipe 430 for draining to the outside； Hypochlorous acid generator 100 for generating hypochlorous acid having a concentration of 3 ~ 200ppm by electrolyzing a mixed solution of water and sodium chloride initially introduced through the drain pipe 400, It is composed of a disinfectant solution supply pipe 200 for supplying hypochlorous acid water generated by the hypochlorous acid generator 100 to the disinfection tank, the generated hypochlorous acid water circulates the disinfection tank 300 and hypochlorous acid generator 100 It is configured to supply to the disinfection tank 300 again, Hypochlorous acid generator 100 A flow meter 810 installed on a conduit of a recovery pipe 410 for recovering a solution discharged from the disinfection tank 100 located at an upper part thereof to determine a flow rate of the solution； A mixing tank 820 for receiving a solution in which water and sodium chloride are mixed； Metering pump 830 for continuously pumping a predetermined amount of the mixed solution of sodium chloride from the mixing tank 820 and discharged to the mixing pipe 840, A mixing pipe 840 for mixing the solution continuously flowing through the recovery pipe 410 and the mixed sodium chloride solution discharged from the metering pump, A reactor 860 for electrolytically dissolving the solution continuously introd
