To provide a solid polymer electrolyte fuel cell in which dew drops adhering to the wall faces of flow pipeline of a separator to pass a fuel gas and an oxidizing agent gas can be removed.

Different from a conventional separator employed for a conventional solid polymer electrolyte fuel cell, a separator 1 is so formed as to have through holes 825A, 826A directly communicated with grooves 821A which are a partial flow pipeline to pass an oxidizing agent gas through. A plurality of the grooves 821A which the separator 1 has are connected in series one another through a groove 11A having the same cross-section shape as those of the grooves 821A to make an oxidizing agent gas 98 flow in the grooves. Moreover, though through holes 825B, 826B which the separator 1 has are communicated with grooves (not shown in the figure) to make a heat medium flow through in the same manner as a conventional fuel cell, these grooves for the flow of the heat medium are mutually connected in series from a viewpoint of the flow of the heat medium through the through hole 825B and the through hole 826B in a different manner in a conventional separator.