A thermoplastic elastomer for carbon fiber reinforced plastic bonding lamination, which contains a styrene-based thermoplastic elastomer and a polymer modified by an α,β-unsaturated carboxylic acid or a derivative thereof, the styrene-based thermoplastic elastomer contains the following components (a) to (d), and in the thermoplastic elastomer, a concentration of an α,β-unsaturated carboxylic acid derived from the polymer modified by the α,β-unsaturated carboxylic acid or a derivative thereof is 0.01 to 10% by mass: component (a): a hydrogenated block copolymer which is a hydrogenated product of an - block copolymer and/or an - - block copolymer composed of a vinyl aromatic compound polymer block and a conjugated diene polymer block exclusive of isoprene alone, wherein at least 80% of double bonds of the conjugated diene moiety of the conjugated diene polymer block is saturated through hydrogenation, and a weight average molecular weight thereof is 80,000 to 1,000,000; component (b): a hydrocarbon softening agent for rubber; component (c): a hydrogenated block copolymer composed of an - - triblock copolymer which is composed of a vinyl aromatic compound polymer block and a conjugated diene polymer block, wherein the conjugated diene polymer block is constituted of isoprene; and a part or all of carbon-carbon double bonds based on isoprene are hydrogenated; and component (d): an olefin-based crystalline resin. the styrene-based thermoplastic elastomer contains the following components (a) to (d), and in the thermoplastic elastomer, a concentration of an α,β-unsaturated carboxylic acid derived from the polymer modified by the α,β-unsaturated carboxylic acid or a derivative thereof is 0.01 to 10% by mass: component (a): a hydrogenated block copolymer which is a hydrogenated product of an - block copolymer and/or an - - block copolymer composed of a vinyl aromatic compound polymer block and a conjugated diene polymer block exclusive of isoprene alone, wherein at least 80% of double bonds of the conjugated diene moiety of the conjugated diene polymer block is saturated through hydrogenation, and a weight average molecular weight thereof is 80,000 to 1,000,000; component (b): a hydrocarbon softening agent for rubber; component (c): a hydrogenated block copolymer composed of an - - triblock copolymer which is composed of a vinyl aromatic compound polymer block and a conjugated diene polymer block, wherein the conjugated diene polymer block is constituted of isoprene; and a part or all of carbon-carbon double bonds based on isoprene are hydrogenated; and component (d): an olefin-based crystalline resin. component (a): a hydrogenated block copolymer which is a hydrogenated product of an - block copolymer and/or an - - block copolymer composed of a vinyl aromatic compound polymer block and a conjugated diene polymer block exclusive of isoprene alone, wherein at least 80% of double bonds of the conjugated diene moiety of the conjugated diene polymer block is saturated through hydrogenation, and a weight average molecular weight thereof is 80,000 to 1,000,000; component (b): a hydrocarbon softening agent for rubber; component (c): a hydrogenated block copolymer composed of an - - triblock copolymer which is composed of a vinyl aromatic compound polymer block and a conjugated diene polymer block, wherein the conjugated diene polymer block is constituted of isoprene; and a part or all of carbon-carbon double bonds based on isoprene are hydrogenated; and component (d): an olefin-based crystalline resin.