WATER ELECTROLYZER

PURPOSE:To improve an electrolytic efficiency and to increase an energy saving effect. CONSTITUTION:In the electrolyzer E in which porous electrodes are brought into contact with both sides a solid high polymer electrolyte diaphragm 1 as an anode 2 and a cathode 5 respectively and the water system allowing water to flow to the anode 2 and the cathode 5 respectively is provided, the solid high polymer electrolyte 3 equal to or similar to the solid high polymer electrolyte diaphragm 1 is applied on the anode 2 and the cathode 5 at prescribed intervals. In this way, the contact points of the electrodes 2 and 5 with the solid high polymer electrolyte 3 are formed in three-dimentional over the whole electrodes to improve the contact of passing water with the contact points of the electrodes and the solid high polymer electrolytes.