Disclosed is a heat shrinkable polyester film formed from a polyester resin that is mainly composed of ethylene terephthalate and contains 3-12% by mole (inclusive) of one or more monomer components, which can be amorphous components, relative to all the polyester resin components, in which the heat shrinkable polyester film has a main shrinkage direction which is the width direction. The heat shrinkable polyester film is characterized in that the shrinkage in 80° C. glycerin, the shrinkage in 130° C. glycerin and the tensile breaking strength in the longitudinal direction are controlled within specific ranges.