<p>A heat-shrinkable polyester film suitable for the use as labels for bottles which exhibits at least a high heat shrinkage factor and little causes whitening even when heat-shrunken, specifically, a heat-shrinkable polyester film which exhibits a heat shrinkage factor of 30 to 60% in the main shrinkage direction when immersed in hot water of 95±0.5°C for 10 seconds and which elongates in the direction perpendicular to the main shrinkage direction when immersed in hot water kept at a temperature of 59.5 to 90.5°C (with a tolerance of ±0.5°C) for 10 seconds. It is preferable that the film exhibit a heat shrinkage factor of less than 40% in the main shrinkage direction when immersed in hot water of 80±0.5°C for 10 seconds.</p>
