<p>A cooling device for providing cooling of integrated circuit semiconductor chips is so arranged as to transfer a heat via thin fin members which are fitted with each other with a small clearance. The bottom surface of one of thermal conductive members which is provided integrally with the fin members is made greater in surface area than a back planar surface of the semiconductor chip, and the thermal conductive member and the semiconductor chip are kept at all times in plane contact with each other, thereby enhancing the cooling performance.</p>
