Abstract: A high pressure electrolyzer as represented in the figure, having a number of electrolysis chambers being held in frame (1), being separated by membrane (2) to which the electrodes (3) are pressed. The electrodes are electrically connected to the bipolar plate (4) with a metal woven sheet (5). The frame has the larger conduit openings (7) on the top side and (8) on the bottom side. Conduit openings (7) evacuate the gas that is generated and openings (8) form a supply channel of electrolyte. Opening (7) is connected to the electrolyzer module's inner space with the small connecting conduit (9) and similarly opening (8) is connected to the inner space via small connecting conduit (10). A ring shaped frame having conduit openings for the supply of electrolyte and the removal of the gasses that are generated and further having a connecting surface with concentric elevations and depressions.