Provided is a resin foam having excellent strain recovery, in particular having little shrinkage of the foam structure at high temperatures caused by the recovery force of the resin and excellent strain recovery at high temperatures. This resin foam is characterized by: being obtained from a resin composition including an elastomer and an active energy ray curable compound; having a glass transition temperature of 30 DEG C or less, found by dynamic viscoelastic measurement of a measurement sample in a non-foamed state; and having a storage modulus (E') of 1.0 107 Pa or more at 20 DEG C, found by dynamic viscoelastic measurement of the measurement sample in a non-foamed state.