Resin composition, stretchable film, sheet and tube

A resin composition comprising a hydrogenated block copolymer composition comprising a hydrogenated block copolymer A represented by General Formula (A) and a hydrogenated block copolymer B represented by General Formula (B);

• and a polyolefin thermoplastic resin C,
• wherein the weight ratio (A/B) of the hydrogenated block copolymer A to the hydrogenated block copolymer B in the hydrogenated block copolymer composition is 10/90 to 80/20, and the hydrogenation ratio of olefins in polymer components constituting the hydrogenated block copolymer composition is 10 to 100% the hydrogenation ratio being the proportion (mol %) of hydrogenated bonds of the total non-aromatic carbon-carbon double bonds contained in the polymer components before hydrogenation:
• Ar1a-HDa-Ar2a (A)
• Ar1b-HDb-Ar2b (B)
• wherein in General Formulae (A) and (B) above, Ar1a, Ar2a, Ar1b, and Ar2b are each an aromatic vinyl polymer block, HDa and HDb are each a hydrogenated polymer block of a conjugated diene polymer, the ratio (Mw(Ar2a)/Mw(Ar1a)) of the weight average molecular weight of Ar2a (Mw(Ar2a)) to the weight average molecular weight of Ar1a (Mw(Ar1a)) is 2.6 to 66, and the ratio (Mw(Ar2b)/Mw(Ar1b)) of the weight average molecular weight of Ar2b (Mw(Ar2b)) to the weight average molecular weight of Ar1b (Mw(Ar1b)) is 0.95 to 1.05, and the ratio of the vinyl bond content of the hydrogenated polymer block HDb of the conjugated diene polymer constituting the hydrogenated block copolymer B to the vinyl bond content of the hydrogenated polymer block HDa of the conjugated diene polymer constituting the hydrogenated block copolymer A is in the range of 0.95 to 1.05.