NOVELTY - The device comprises a polymer-electrolyte-membrane arranged in a housing and equipped with catalytically effective permeable electrodes on both sides that are provided for applying an electric DC voltage, a first channel for the supply of water to two or more membrane-electrode-arrangements (8), a recess through which the gases produced on the membrane-electrode-arrangement within the housing are mixable to each other, a second channel for withdrawing the produced gas mixture, and mechanical means for holding the stack.    USE - Device for producing oxygen-/ hydrogen mixture from oxyhydrogen gas.    ADVANTAGE - The device requires less space, can be economically manufactured and ensures economical production of oxygen-/ hydrogen mixture with less effort.    DETAILED DESCRIPTION - The device comprises a polymer-electrolyte-membrane arranged in a housing and equipped with catalytically effective permeable electrodes on both sides that are provided for applying an electric DC voltage, a first channel for the supply of water to two or more membrane-electrode-arrangements (8), a recess through which the gases produced on the membrane-electrode-arrangement within the housing are mixable to each other, a second channel for withdrawing the produced gas mixture, and mechanical means for holding the stack. Metal plate channels forming between the membrane-electrode-arrangements are arranged as bipolar plates and formed through corrugated sheet consisting of titanium or titanium alloy. A first transverse channel formed through recess for the water supply and a second transverse channel formed through the recess for the discharge of gas and water mixture, where the transverse channels are arranged at the channel edges of the metal plates (9). The metal plates are arranged and aligned so that the channels are arranged vertical between the bottom lying first transverse channel and the top lying second transverse channel. The membrane-electrode-arrangements are arranged respectively in frames (3, 4), which are arranged in sealed stacks (11) and clamped between two end plates (1, 2). Each frame comprises a groove for the first transverse channel and a recess for transverse channel. The metal plates are arranged in the frames, which are incorporated with the metal plates in the stacks tightly between two frames with the membrane-electrode-arrangement. The metal plate comprises recesses at the edge side that are interfused by projections in the frames and form a positive connection. The frames are formed as plastic injection molding part for the metal plate or formed from foils for the membrane-electrode-arrangement. The frame comprises a rotatable sealing on a side and the sealing is produced together with the frame in two-component injection-molding process. The housing is formed by the frame and the end plate. The end plate comprises electrode consisting of copper at its side directed to the interior of the stack and the electrode is connected with an electrical connection. The electrodes are separated through a titanium film from the interior of the housing. The recess flowing in the channel is equipped in the end plate and is formed to a line adapter on the external side.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic simplified explosion representation of an oxyhydrogen gas.    End plate (1, 2)    Frame (3, 4)    Membrane-electrode-arrangement (8)    Metal plates (9)    Stack. (11)