NOVELTY - The fuel cell has a membrane-electrode composite (13) consisting of electrolyte film, electrode layers, and gaseous-diffusion layers (5,6). Unit cells (1) having separators (8,10) with gas flow paths (7,9), are joined to the composite. A load is provided to some of the unit cells. A sealing component (15) which partitions off the composite and space consisting of gas flow paths, and its external space, is held with the composite between the separators. When load is provided, a projection (17) provided ahead of sealing component is crushed.    USE - Fuel cell is used for electric-power generation in automotive applications.    ADVANTAGE - The fuel cell prevents positional offset of gaseous-diffusion layer and separator caused by deformation of sealing component. The fuel cell can be manufactured easily and quickly. The sealing component prevents leakage of fuel gas and oxidizing-gas to the external space.    DETAILED DESCRIPTION - The fuel cell has a membrane-electrode composite (13) consisting of an electrolyte film, two electrode layers provided on both sides of the electrolyte film, and two gaseous-diffusion layers (5,6) arranged on the outer side of the electrode layer. Two or more unit cells (1) provided with two separators (8,10) having gas flow paths (7,9) into which fuel gas and oxidizing-agent gas flow, are laminated and joined to both sides of the composite. A load is provided to some of the unit cells. A sealing component (15) which partitions off the composite and space consisting of gas flow paths, and its external space, is held with the composite in the gap between the separators. When the load is provided to unit cells, a projection (17) provided ahead of the sealing component is crushed. The projection consists of carbon paper or carbon felt. An INDEPENDENT CLAIM is included for manufacture of fuel cell.    DESCRIPTION OF DRAWING(S) - The drawing shows the fragmentary longitudinal cross-section of the reaction portion of unit cell of the fuel cell.    Unit cell (1)    Gaseous-diffusion layers (5,6)    Gas flow paths (7,9)    Separators (8,10)    Membrane-electrode composite (13)    Sealing component (15)    Projection (17)