Provided is a cooling sheet attachment apparatus to a focusing ring for a semiconductor manufacturing apparatus, including: a vacuum chamber equipped with a sheet support ring fixed to seat a cooling sheet in a chamber body with an adhesion surface exposed in an upward direction, a centering jig installed on an inner or outer circumferential surface of the sheet support ring liftably to be moved back in the upward direction by an elastic support, a cover for opening/closing installed above the chamber body and lifted by a lift unit, a press unit provided on the cover to press down the focusing ring, and a vacuum suction tube connected to the chamber body for vacuum suction; and a vacuum suction unit to create a vacuum in the vacuum chamber by the suction through the vacuum suction tube.