The present invention concerns a separator plate for use in a fuel cell stack with a substantially circular or oval main surface wherein a fluid flow path is defined by a plurality of channels extending substantially in parallel to each other and leading a fluid from a fluid supply port to a fluid discharge port. Adjacent channels merge such as to decrease the number of parallel channels from the supply port to the discharge port, thereby decreasing a cross sectional area of the flow path. The plurality of parallel channels comprises the following sections: a first section starting at the fluid supply port wherein the plurality of parallel channels extends in a curve along an outer contour of the main surface, a second section wherein the plurality of parallel channels extend at a certain distance to the outer contour in a curve being parallel to said outer contour, a C-shaped third section, a central horse-iron-shaped forth section extending around a center of the main surface, the orientation of the C-shaped forth section being opposite the orientation of the C-shaped third section, a fifth section wherein the plurality of parallel channels is led back to the outer contour of the main surface, and a final section wherein the plurality of parallel channels extends in a curve along the outer contour of the main surface until it reaches the fluid discharge port.