A sealing member for a fuel cell of the present invention includes a resin forming a matrix phase, and particles which are formed of rubber-like elastic body and dispersed in the resin. The sealing member exhibits acid resistance due to the resin, as well as elasticity due to the elastic particles, which gives excellent sealing property to the sealing member. Since acid resistance is steadily provided by the resin, unlike the conventional sealing member, the sealing member does not require expensive fluororubber and can be produced at a reduced cost.