<p>Provided is a seal ring which can ensure satisfactory sealing property, has a chemical resistance and plasma resistance and is excellent in the prevention of sticking. A seal ring characterized in that a non-sticking material layer is formed over the whole perimeter of a seal ring body comprising an elastomer on the inner diameter side surface or the outer diameter side surface of the seal ring body, and a notched portion toward the non-sticking material layer is formed over the whole perimeter of the seal ring body on the surface of the side opposite to the surface having the non-sticking material layer formed thereon.</p>
