NOVELTY - The hydrogen generator comprises an oxygen discharge induction pipe (51) installed at an inner side of a reservoir box (10) in a longitudinal direction. An electrode terminal rod (40) of an anode is inserted inside the induction pipe. An electrolysis occurs in the inner side of the reservoir box so that oxygen rises to limited domain of the inner side of the induction pipe if direct current is electrified in a current source terminal of the anode and a cathode of an electrode terminal block (30). The electrode block is installed in a wide contact area at a lower part of the reservoir box.    USE - The hydrogen generator is useful for electrolyzing water into hydrogen and oxygen (claimed).    ADVANTAGE - The hydrogen generator collects the activation hydrogen gas at an empty space thus avoiding the danger of hydrogen explosion so as to improve safety of circulating hydrogen water.    DETAILED DESCRIPTION - The hydrogen generator comprises an oxygen discharge induction pipe (51) installed at an inner side of a reservoir box (10) in a longitudinal direction. An electrode terminal rod (40) of an anode is inserted inside the oxygen discharge induction pipe. An electrolysis occurs in the inner side of the reservoir box so that oxygen rises to limited domain of the inner side of the oxygen discharge induction pipe if direct current is electrified in a current source terminal of the anode and a cathode of an electrode terminal block (30). The electrode block is installed in a wide contact area at a lower part of the reservoir box. A rectifier (31) receives an alternating current and converts alternating current into a direct current. The oxygen discharge induction pipe supplies the hydrogen water and attachably/detachably arranged along an inner periphery of the reservoir box through a fasten-unfastening unit. The oxygen discharge induction pipe is in a form of cylinder and polygon shape. A lower edge of the detaching unit includes a narrow top part and a wide bottom part. A concave shield is located at a central part of the reservoir box. An internal water penetration unit with an inlet port is formed at a lower part of an inner wall. An opening is located in an upper side of an underwater compartment for accommodating the electrode terminal block. A sterilization filter is connected with the reservoir box through an inlet tube for providing purified water. A linked buzzer is set along upper and lower directions of the inlet tube connected with the reservoir box, where the buzzer controls the supply of water. An upper end of the reservoir box includes a space in which a hydrogen gas element is placed in the electrode terminal block, where an oxygen gas is exhausted in the oxygen discharge induction pipe. A water forming penetration hole is formed along upper and lower direction of the electrode terminal block. A concavo-convex electrode terminal plate is arranged in the electrode terminal block. The induction pipe supplies hydrogen water integrally to a side along an inner periphery of the reservoir box.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic perspective view of a hydrogen generator.    Reservoir box (10)    Cathode electrode terminal block (30)    Rectifier (31)    Electrode terminal rod (40)    Oxygen discharge induction pipe. (51)