<；P>；PROBLEM TO BE SOLVED: To provide an active oxygen generating apparatus capable of restoring an active oxygen generating ability of a cathode in which the generation of the active oxygen is deteriorated with a simple method that the conductivity of the cathode is restored by laying the polyaniline under an oxygen atmosphere to change the structure of polyaniline turned to emeraldine into emeraldine-salt. <；P>；SOLUTION: The active oxygen generating apparatus for generating active oxygen by arranging an anode 2 and a cathode 1 containing polyaniline in water in a water tank 17 and applying current between the anode and the cathode is provided with a means for making the water in the water tank acidic, When the cathode is present in the acidic solution, the conductivity of the cathode, that is. the active oxygen generating ability is restored by providing a certain period in which the energization to the cathode is stopped. <；P>；COPYRIGHT: (C)2011,JPO&INPIT
