a heat - shrinkable film includes outer layers containing a polyester resin , and at least one inner layer being arranged between the outer layers and containing an olefinic resin including at least one ethylene - propylene - butene terpolymer . the film has an interlayer bonding strength between the inner layer and the outer layer of 3 . 0 n / 15 - mm or more . the inner layer may contain the ethylene - propylene - butene terpolymer in an amount of 45 percent by weight or more based on the total weight of the inner layer . the heat - shrinkable film is excellent in strength , abrasion resistance , solvent resistance , dimensional stability , and optical transparency , exhibits high shrinkability and high flexibility as a result of heating , and thereby yields beautiful finish after shrinkage . the heat - shrinkable film can be suitably recycled after use .