A thermally shrinkable laminated film formed by stretching along at least one axis a sheet comprising: an intermediate layer consisting of a block copolymer resin composition comprising a block copolymer (a) which consists of a vinyl aromatic hydrocarbon and a conjugated diene, and a block copolymer (b) which is different from the block copolymer (a) and consists of a vinyl aromatic hydrocarbon and a conjugated diene, the mass ratio of (a)/(b) being in a range of 20/80 to 50/50 and the content in percentages of the conjugated dienes being 20 to 30 mass%; and a front layer and a back layer which are laminated on two sides of the intermediate layer and consist of a polyester resin; the film having a thermal shrinkage rate of at least 40% in 10 seconds at 80 °C and an interlayer adhesion strength of at least 0.6 N/15 mm when separated at a tension rate of 500 mm/min in the direction of the stretching axis; wherein: the block copolymer (a) consists of a linear block copolymer having a mass ratio of the vinyl aromatic hydrocarbon to the conjugated diene of 65/35 to 41/59, a number average molecular weight of 20,000 to 100,000, and: a block portion consisting of the vinyl aromatic hydrocarbon on one end followed by a block portion which is a tapered block portion consisting of the conjugated diene and vinyl aromatic hydrocarbon, the conjugated diene gradually decreasing towards the other end; the mass ratio of the vinyl aromatic hydrocarbon to the conjugated diene in the tapered block portion being 20/80 to 60/40; and the proportion of the tapered block portion in the block copolymer being at least 60 mass%; and the block copolymer (b) consists of a linear block copolymer having a mass ratio of the vinyl aromatic hydrocarbon to the conjugated diene of 80/20 to 90/10, with at least one end being a block portion consisting of the vinyl aromatic hydrocarbon, and a number average molecular weight of at least 100,000 and at most 300,000. an intermediate layer consisting of a block copolymer resin composition comprising a block copolymer (a) which consists of a vinyl aromatic hydrocarbon and a conjugated diene, and a block copolymer (b) which is different from the block copolymer (a) and consists of a vinyl aromatic hydrocarbon and a conjugated diene, the mass ratio of (a)/(b) being in a range of 20/80 to 50/50 and the content in percentages of the conjugated dienes being 20 to 30 mass%; and a front layer and a back layer which are laminated on two sides of the intermediate layer and consist of a polyester resin; the film having a thermal shrinkage rate of at least 40% in 10 seconds at 80 °C and an interlayer adhesion strength of at least 0.6 N/15 mm when separated at a tension rate of 500 mm/min in the direction of the stretching axis; wherein: the block copolymer (a) consists of a linear block copolymer having a mass ratio of the vinyl aromatic hydrocarbon to the conjugated diene of 65/35 to 41/59, a number average molecular weight of 20,000 to 100,000, and: a block portion consisting of the vinyl aromatic hydrocarbon on one end followed by a block portion which is a tapered block portion consisting of the conjugated diene and vinyl aromatic hydrocarbon, the conjugated diene gradually decreasing towards the other end; the mass ratio of the vinyl aromatic hydrocarbon to the conjugated diene in the tapered block portion being 20/80 to 60/40; and the proportion of the tapered block portion in the block copolymer being at least 60 mass%; and the block copolymer (b) consists of a linear block copolymer having a mass ratio of the vinyl aromatic hydrocarbon to the conjugated diene of 80/20 to 90/10, with at least one end being a block portion consisting of the vinyl aromatic hydrocarbon, and a number average molecular weight of at least 100,000 and at most 300,000. the block copolymer (a) consists of a linear block copolymer having a mass ratio of the vinyl aromatic hydrocarbon to the conjugated diene of 65/35 to 41/59, a number average molecular weight of 20,000 to 100,000, and: a block portion consisting of the vinyl aromatic hydrocarbon on one end followed by a block portion which is a tapered block portion consisting of the conjugated diene and vinyl aromatic hydrocarbon, the conjugated diene gradually decreasing towards the other end; the mass ratio of the vinyl aromatic hydrocarbon to the conjugated diene in the tapered block portion being 20/80 to 60/40; and the proportion of the tapered block portion in the block copolymer being at least 60 mass%; and a block portion consisting of the vinyl aromatic hydrocarbon on one end followed by a block portion which is a tapered block portion consisting of the conjugated diene and vinyl aromatic hydrocarbon, the conjugated diene gradually decreasing towards the other end; the mass ratio of the vinyl aromatic hydrocarbon to the conjugated diene in the tapered block portion being 20/80 to 60/40; and the proportion of the tapered block portion in the block copolymer being at least 60 mass%; and the block copolymer (b) consists of a linear block copolymer having a mass ratio of the vinyl aromatic hydrocarbon to the conjugated diene of 80/20 to 90/10, with at least one end being a block portion consisting of the vinyl aromatic hydrocarbon, and a number average molecular weight of at least 100,000 and at most 300,000.