NOVELTY - The portable hydrogen machine for the production of hydrogen for fuel cell and welding device, comprises a head body (10) equipped with a hollow reaction area (11) having material intake opening (12) arranged above the reaction area and a discharge opening (13) arranged below the reaction area, an unit (20) for determining pressure condition of the gas existing in the reaction area, an unit for determining the condition of the reaction solution present in the reaction area, and a gas discharge unit (40) for discharging the hydrogen from the reaction area.    USE - For the production of hydrogen for fuel cell and welding device.    ADVANTAGE - The machine is very comfortable to transport and simple and ensures safe, fast and uninterrupted production of hydrogen. The reaction area prevents the escape of hydrogen.    DETAILED DESCRIPTION - The portable hydrogen machine for the production of hydrogen for fuel cell and welding device, comprises a head body (10) equipped with a hollow reaction area (11) having material intake opening (12) arranged above the reaction area and a discharge opening (13) arranged below the reaction area, an unit (20) for determining pressure condition of the gas existing in the reaction area, an unit for determining the condition of the reaction solution present in the reaction area, and a gas discharge unit (40) for discharging the hydrogen from the reaction area. The material intake opening enables an infeed of reaction solution and metallic material in the reaction area to produce hydrogen by chemical reaction in the reaction area, and is equipped with a sealing cover. The metallic material is in the form of blocks, plates, strips, grains and/or powder associated with acid or alkaline reaction solution. The discharge opening is equipped with a discharge valve by which the discharge of the reaction solution is controllable. The pressure determination unit is equipped with a manometer, which is connected with the reaction area for indicating pressure of the gas, and has an automatic relaxation unit by which the pressure of the gas in the reaction area is automatically recoverable with over pressure. The unit for the determination of the reaction solution is equipped with a thermometer for the temperature of the reaction solution, and has an indicator for concentration or pH value of the reaction solution and a level indicator that is equipped with a shop-window arranged outside of the head body. A scale with scale graduation marks is arranged on the shop-window for indicating filling level of the reaction solution. The gas-discharging unit is equipped with a gas-discharging pipeline, with an adapter connection and with a gas volume counter and/or volume control valve by which the gas flow quantity is controllable, and has a gas filter.    DESCRIPTION OF DRAWING(S) - The figure shows a portable hydrogen machine.    Head body (10)    Reaction area (11)    Material intake opening (12)    Discharge opening (13)    Pressure determination unit (20)    Gas discharge unit. (40)