Provided are a sheet-forming body and an adhesive sheet having excellent handling and workability and whereby a rubber member, particularly a vulcanizing rubber member, can be strongly adhered, as a result of using a sheet-forming body including a compound having a thiourethane bond and a compound having a thiol group, said sheet-forming body having a ratio (A/B) of 20-250 between a peak intensity (A) and a peak intensity (B), said peak intensity (A) being for an absorption peak, in an infrared absorption spectrum, on the basis of a carbonyl group in the thiourethane bond and said peak intensity (B) being for an absorption peak on the basis of the thiol group. Also provided is a laminate comprising a rubber layer adhered using said sheet-forming body.