Reinforced Graphite Sheet is manufactured from pure flexible graphite sheets reinforced with metallic material. As reinforcement material between the sheet, one or two layers of stainless perforated sheet, stainless foil, stainless braided wire, or carbon steel perforated sheet are used, and both sides of the sheet are coated with pure graphite sheet. The graphite layers and reinforcement materials are bonded to each other mechanically or with adhesive.