GASKET AND SEALING STRUCTURE

摘要

Provided are a gasket and a sealing structure capable of exhibiting in a stable fashion a sealing property even when a surface to be sealed is a roughened surface such as a cast skin. A gasket (10) made from a rubber-type elastic body which is mounted in a mounting groove provided on at least one of two members and seals the gap between the two members is characterized in that being provided with: a first seal surface (10a) for contacting with the surface of one of the two members; a second seal surface (10b) for contacting with the surface of the other of the two members; a third seal surface (10c) for contacting with a lateral surface of the mounting groove; and a pressure-receiving groove (11) provided so as to be in parallel to the first seal surface and the second seal surface, the pressure-receiving groove opening on the side subjected to sealed fluid pressure, that being the side opposite from the third seal surface.