A layered body comprising a rubber layer and an adhesion layer, the adhesion layer being formed using a composition including: a polythiol compound; a compound having plural epoxy groups; a radical generator; and an amine-based catalyst, wherein a ratio (Ep/SH (epoxy groups/thiol groups)) of a total molar number (Ep) of epoxy groups contained in the compound having plural epoxy groups to a total molar number of thiol groups contained in the polythiol compound is 0.50 or higher but lower than 2.00, wherein the radical generator is a thermal radical generator comprising a peroxide, a ratio of a total molar number of carbon-carbon double bonds contained in optional carbon-carbon double bond-containing compounds contained in the composition relative to the total molar number of thiol groups contained in the polythiol compound contained in the composition (carbon-carbon double bonds/thiol groups) is lower than 0.4, the total molar number of thiol groups contained in the polythiol compound is obtained by multiplying the molar number of the polythiol compound by the number of thiol groups contained in one molecule of the polythiol compound, the total molar number (Ep) of epoxy groups contained in the compound having plural epoxy groups is obtained by dividing the content of the compound having plural epoxy groups by a theoretical molecular weight of the compound having plural epoxy groups, and multiplying the obtained value by the number of epoxy groups contained in one molecule of the compound having plural epoxy groups, and the total molar number of carbon-carbon double bonds contained in the carbon-carbon double bond-containing compound contained in the composition is obtained by multiplying the molar number of the carbon-carbon double bond-containing compound contained in the composition by the number of carbon-carbon double bonds contained in one molecule of the carbon-carbon double bond-containing compound. a polythiol compound; a compound having plural epoxy groups; a radical generator; and an amine-based catalyst, wherein a ratio (Ep/SH (epoxy groups/thiol groups)) of a total molar number (Ep) of epoxy groups contained in the compound having plural epoxy groups to a total molar number of thiol groups contained in the polythiol compound is 0.50 or higher but lower than 2.00, wherein the radical generator is a thermal radical generator comprising a peroxide, a ratio of a total molar number of carbon-carbon double bonds contained in optional carbon-carbon double bond-containing compounds contained in the composition relative to the total molar number of thiol groups contained in the polythiol compound contained in the composition (carbon-carbon double bonds/thiol groups) is lower than 0.4, the total molar number of thiol groups contained in the polythiol compound is obtained by multiplying the molar number of the polythiol compound by the number of thiol groups contained in one molecule of the polythiol compound, the total molar number (Ep) of epoxy groups contained in the compound having plural epoxy groups is obtained by dividing the content of the compound having plural epoxy groups by a theoretical molecular weight of the compound having plural epoxy groups, and multiplying the obtained value by the number of epoxy groups contained in one molecule of the compound having plural epoxy groups, and the total molar number of carbon-carbon double bonds contained in the carbon-carbon double bond-containing compound contained in the composition is obtained by multiplying the molar number of the carbon-carbon double bond-containing compound contained in the composition by the number of carbon-carbon double bonds contained in one molecule of the carbon-carbon double bond-containing compound.