Abstract: A self-sealing compression packaging bag for compression sealing of an article on evacuation and a compression packaging kit using the bag. Clothing is introduced at an opening part of a bag formed of a film material exhibiting self-adherent properties and provided with an evacuating port. An evacuating tube is introduced into the evacuating port and the inside of the bag is evacuated through the tube by a vacuum pump. The opening part is automatically sealed at this time, and the evacuation port is automatically sealed on extracting the evacuating tube. Tight sealing of the bag may be achieved automatically on evacuation without the need for heat compression bonding. Also, the bag is portable.