A resin composition comprising a modified block copolymer and a thermoplastic polyurethane, wherein the modified block copolymer comprises: a polymer block comprising a vinyl aromatic compound as a main constituent, a polymer block comprising a conjugate diene compound, and an atomic group having NHx (x = 0 to 2), wherein the polymer block comprising a conjugate diene compound as a main constituent is a hydrogenated product, the atomic group having NHx (x = 0 to 2) is contained in a side chain, and the compound forming the atomic group having NHx (x = 0 to 2) satisfies the following condition: Condition: when the compound forming the atomic group having NHx (x = 0 to 2) is reacted with a maleic anhydride-modified group in a maleic anhydride-modified block copolymer, a MFR value at 230°C under a load of 2.16 kg of the modified block copolymer after the reaction is 0.1 times or more a MFR value at 230°C under a load of 2.16 kg of the maleic anhydride-modified block copolymer before the reaction, wherein the atomic group having NHx (x = 0 to 2) has a structure of X-R1-NH-R2, R1 is a C2-C22 substituted or unsubstituted, saturated or unsaturated hydrocarbon group, R2 is a C2-C13 substituted or unsubstituted, saturated or unsaturated hydrocarbon group, and X has a structure in which a carbon-carbon unsaturated bond forms a chemical bond with the polymer block and/or the polymer block via graft modification, and wherein the number of the atomic group having NHx (x = 0 to 2) per polymerized chain exceeds 1. a polymer block comprising a vinyl aromatic compound as a main constituent, a polymer block comprising a conjugate diene compound, and an atomic group having NHx (x = 0 to 2), wherein the polymer block comprising a conjugate diene compound as a main constituent is a hydrogenated product, the atomic group having NHx (x = 0 to 2) is contained in a side chain, and the compound forming the atomic group having NHx (x = 0 to 2) satisfies the following condition: Condition: when the compound forming the atomic group having NHx (x = 0 to 2) is reacted with a maleic anhydride-modified group in a maleic anhydride-modified block copolymer, a MFR value at 230°C under a load of 2.16 kg of the modified block copolymer after the reaction is 0.1 times or more a MFR value at 230°C under a load of 2.16 kg of the maleic anhydride-modified block copolymer before the reaction, wherein the atomic group having NHx (x = 0 to 2) has a structure of X-R1-NH-R2, R1 is a C2-C22 substituted or unsubstituted, saturated or unsaturated hydrocarbon group, R2 is a C2-C13 substituted or unsubstituted, saturated or unsaturated hydrocarbon group, and X has a structure in which a carbon-carbon unsaturated bond forms a chemical bond with the polymer block and/or the polymer block via graft modification, and wherein the number of the atomic group having NHx (x = 0 to 2) per polymerized chain exceeds 1. Condition: when the compound forming the atomic group having NHx (x = 0 to 2) is reacted with a maleic anhydride-modified group in a maleic anhydride-modified block copolymer, a MFR value at 230°C under a load of 2.16 kg of the modified block copolymer after the reaction is 0.1 times or more a MFR value at 230°C under a load of 2.16 kg of the maleic anhydride-modified block copolymer before the reaction, wherein the atomic group having NHx (x = 0 to 2) has a structure of X-R1-NH-R2, R1 is a C2-C22 substituted or unsubstituted, saturated or unsaturated hydrocarbon group, R2 is a C2-C13 substituted or unsubstituted, saturated or unsaturated hydrocarbon group, and X has a structure in which a carbon-carbon unsaturated bond forms a chemical bond with the polymer block and/or the polymer block via graft modification, and wherein the number of the atomic group having NHx (x = 0 to 2) per polymerized chain exceeds 1.