NOVELTY - A stack for a polymer electrolyte fuel cell comprises stacked unit cells. Each unit cell comprises a coupler attached to both sides of a separator plate and formed with openings and penetrating passages to expose the manifolds and the flow passages.    USE - For a polymer electrolyte fuel cell (claimed).    ADVANTAGE - The stack for the fuel cell is simplified in structure and reduced in weight to simplify processes and reduce costs upon manufacture.    DETAILED DESCRIPTION - A stack for a polymer electrolyte fuel cell comprises stacked unit cells. Each unit cell comprises:    (a) a conductive separator plate (200) formed with flow passages and manifolds for gas supply;    (b) a coupler (100) attached to both sides of the separator plate and formed with openings and penetrating passages to expose the manifolds and the flow passages; and    (c) a membrane electrode assembly (300) between assemblies of the conductive separator and the coupler.    INDEPENDENT CLAIMS are also included for:    (1) a polymer electrolyte fuel cell comprising a stack of unit cells and a fixing unit (400) positioned at both ends of the stack to fix the stack; and    (2) a method of manufacturing a polymer electrolyte fuel cell comprising constructing a structure by placing membrane electrode assemblies between couplers attached to both sides of a conductive separator plate, which is formed with manifolds and flow passages for gas supply, and formed with openings and penetrating passages to expose the manifolds and the flow passages; and repeatedly stacking structures constructed by bonding the couplers to the separator plates through heating and pressing to simultaneously achieve sealing and configuration of a stack for the fuel cell.    DESCRIPTION OF DRAWING(S) - The figure shows the polymer electrolyte fuel cell.    Coupler (100)    Conductive separator plate (200)    Membrane electrode assembly (300)    Fixing unit (400)    Bolts (410)    Nuts (420)    End plates (430)    Conductive flow passage plates (500)