NOVELTY - A hydrogen and oxygen generator (200) comprises electrolysis unit, temperature control unit, and safety unit (214). The electrolysis unit receives and stores water for electrolysis. The electrolysis unit electrolyzes the water to produce a gas mixture including oxygen gas and hydrogen gas, and discharges the gas mixture through gas mixture discharge line at its upper portion. The temperature control unit controls the temperature of electrolysis unit. The safety unit prevents explosion due to excessive accumulation of gas mixture produced in electrolysis unit.    USE - Hydrogen and oxygen generator for internal combustion engine (claimed) for vehicle engine or boiler.    ADVANTAGE - The generator reduces fuel consumption and solves air pollution problems in exhaust gas.    DETAILED DESCRIPTION - A hydrogen and oxygen generator (200) comprises electrolysis unit, temperature control unit, and safety unit (214). The electrolysis unit receives and stores water for electrolysis. The electrolysis unit electrolyzes the water to produce a gas mixture including oxygen gas and hydrogen gas, and discharges the gas mixture through gas mixture discharge line provided at its upper portion. The temperature control unit controls the temperature of electrolysis unit. The safety unit prevents explosion due to excessive accumulation of gas mixture produced in electrolysis unit. The electrolysis unit includes electrolyzer (208) and electrolysis module. The electrolyzer receives and stores water for electrolysis. The electrolysis module electrolyzes water to produce gas mixture. The electrolysis module includes proton exchange membrane, first current supply plate with polarity, and second current supply plate with opposite polarity respectively formed at both sides of proton exchange membrane. The second current plate has electrode function and current supply function.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross sectional view of the gas mixture generator.    Hydrogen and oxygen generator (200)    Blocks (202, 206)    Electrolyzer (208)    Safety unit (214)    Gas mixture discharge pipe (220)