NOVELTY - A sealing structure comprises a membrane electrode assembly (MEA) (3), anode (1) and cathode (2) plates formed with peripheral (17, 29) and extended grooves at circumferential portion, and a silicon rubber applied to the grooves. Before curing the silicon rubbers, the plates and MEA are stacked and compressed with a compression pressure, such that silicon rubbers at the peripheral grooves bind to form a tight sealing at circumferential portions between plates.    USE - For sealing single fuel cell and fuel cell module(s) having proton exchange membrane (claimed).    ADVANTAGE - By dispensing silicon rubber between the plates, the leakage of the gases and liquid guided through the channels on the plates can be avoided. The sealing between the ports of the two plates, forms several separate passages. Thus, the hydrogen gas, oxygen gas and coolant can be separately transported and sealed from leakage. By dispensing silicon rubber between circumferential portions of the plates, the two plates and MEA sandwiched between them can be well positioned in a cushioned manner and can be controlled under predetermined compression pressure in advance before the rubber is cured, thereby ensuring that high quality single cell is obtained. The single cell/module can be formed with excellent gastight effect. The single cell/module formed is highly efficient, mass producible and cost-saving modulized single cell.    DETAILED DESCRIPTION - A sealing structure comprises a membrane electrode assembly (MEA) (3), anode (1) and cathode (2) plates formed with peripheral (17, 29) and extended grooves at circumferential portion, and a silicon rubber applied to the grooves. Before curing the silicon rubbers, the plates and MEA are stacked and compressed with a compression pressure, such that silicon rubbers at the peripheral grooves bind to form a tight sealing at circumferential portions between plates. The MEA is tightly sandwiched between the rubbers at extended grooves of the plates to form a tight sealing around ports between the two plates.    DESCRIPTION OF DRAWING(S) - The figure shows an exploded view of the components of the single cell of the fuel cell.    anode plate (1)    cathode plate (2)    membrane electrode assembly (3)    modulized single cell (10)    peripheral groove of anode plate (17)    extended groove of anode plate (17a)    ports of cathode plate (26a - 26f)    gas channels of cathode plate (28)    peripheral groove of cathode plate (29)    proton exchange membrane. (31)