Abstract: Provided is a resin foam which has satisfactory strain recovery, is particularly resistant to shrinkage of its cell structure caused by the resinous restitutive force at high temperatures, and exhibits superior high-temperature strain recovery. The resin foam according to the present invention is obtained from a resin composition including an elastomer and an active-energy-ray-curable compound. The resin composition gives an unfoamed measurement sample having a glass transition temperature of 30° C. or lower and a storage elastic modulus (E?) at 20° C. of 1.0×107 Pa or more, each determined by a dynamic viscoelastic measurement.