A heat shrinkable polyester film has been patented. The film is comprised of a polyester layer with voids and a polyester layer with a smaller porosity than the first and is formed on the surface of the first layer. The film has a brightness of not less than 70, which permits adhesion with a solvent, and has a percentage of heat shrinkage in hot air at 95°C of 30-90% in either direction of the heat shrinkable polyester film.