NOVELTY - An electrolysis cell (10) electrolysis aqueous solution of water-soluble organic compound. The cell (10) has anode chamber (5) supplied with aqueous solution, anode (6) having catalyst effective in producing carbon dioxide, proton and electron, electrolyte film (7) arranged adjoining anode, cathode chamber (9), cathode (8) having catalyst effective in producing hydrogen by electrochemical reaction of proton and electron, arranged adjoining film (7), and hydrogen permselective unit to selectively permeate hydrogen produced in cathode, arranged adjoining cathode.    USE - For hydrogen supply system (claimed) for manufacturing and supplying hydrogen used as fuel for hydrogen fuel battery vehicle and portable apparatus such as notebook-type personal computer and mobile telephone.    ADVANTAGE - The electrolysis cell produces high purity hydrogen efficiently without using hydrogen purification apparatus.    DETAILED DESCRIPTION - An electrolysis cell (10) electrolysis an aqueous solution of a water-soluble organic compound. The electrolysis cell has an anode chamber (5) supplied with aqueous solution, an anode (6) having catalyst effective in producing carbon dioxide, proton and electron by electrochemical reaction of the aqueous solution, arranged in the anode chamber, an electrolyte film (7) having proton conductivity, arranged adjoining the anode, a cathode chamber (9), a cathode (8) having catalyst effective in producing hydrogen by electrochemical reaction of proton and electron produced in anode, arranged adjoining the electrolyte film, and a hydrogen permselective unit to selectively permeate hydrogen produced in cathode, arranged adjoining the cathode. The hydrogen from permselective unit is supplied to the cathode chamber.    DESCRIPTION OF DRAWING(S) - The figure shows the structure of the electrolysis cell. (Drawing includes non-English text)    Anode chamber (5)    Anode (6)    Electrolyte film (7)    Cathode (8)    Cathode chamber (9)    Electrolysis cell (10)