NOVELTY - A hydrogen generating apparatus comprises a first hydrogen generating unit (210) comprising a first electrode (215) which generates hydrogen by decomposing an electrolyte aqueous solution; second hydrogen generating unit (260) comprising a second electrode and super absorbent polymer gelled when water is absorbed; solution separation membrane; reactor (250) accommodating the hydrogen generating units and solution separation membrane; and hydrogen vent (220) formed on one side of reactor, where side of reactor is adjacent to second hydrogen generating unit.    USE - A hydrogen generating apparatus for a fuel cell power generation system (claimed).    ADVANTAGE - Moisture can be primarily prevented from escaping from the reactor by mounting the solution separation membrane on the path through which hydrogen is discharged. Including a hydrophobic substance in solution separation membrane can be more effective in preventing moisture from passing through the opening. The super absorbent polymer prevents the leakage of water. The hydrogen generating apparatus can generate hydrogen efficiently by using the electrolyte and moisture absorbed in super absorbent polymer. A liquid type of hydrogen generating unit and gel type of hydrogen generating unit can be separated to prevent the discharge of moisture without sacrificing the speed of hydrogen generation and raise the yield of hydrogen by increasing the use of moisture.    DETAILED DESCRIPTION - A hydrogen generating apparatus comprises:    (1) first hydrogen generating unit (210) comprising a first electrode (215) which generates hydrogen by decomposing an electrolyte aqueous solution;    (2) second hydrogen generating unit (260) comprising a second electrode which is placed adjacent to first hydrogen generating unit, and super absorbent polymer formed on a surface of second electrode and gelled when water is absorbed;    (3) solution separation membrane interposed between first and second hydrogen generating units;    (4) reactor (250) accommodating the first and second hydrogen generating units and the solution separation membrane; and    (5) hydrogen vent (220) formed on one side of reactor, where side of reactor is adjacent to second hydrogen generating unit.    DESCRIPTION OF DRAWING(S) - The drawing shows an exploded perspective view of a hydrogen generating apparatus.    First hydrogen generating unit (210)    First electrode (215)    Hydrogen vent (220)    Reactor (250)    Second hydrogen generating unit (260)