A method of producing a fuel cell separator in which dry granules of a composition for a fuel cell separator mainly containing a conductive material, a binder, and an additive are produced by mixing raw materials including at least the conductive material, the binder, and the additive, granulating the resultant mixture to obtain granules, and drying the granules. The dry granules may be further sized. Then the granules are packed in a mold and hot-press molded. The granules have a residual volatile matter content in a range of 4 weight-% or less, and an average particle size in a range of 200 to 700 &mgr;m (60 to 160 &mgr;m for the sized granules) and a specific particle size distribution.