Provided are a patch and a patch preparation having an adhesive layer on at least one surface of a support, and particularly, a patch and a patch preparation superior in skin adhesive force, and causing less adhesive residue on the skin surface. A patch having a support and an adhesive layer formed on at least one surface of the support, wherein the adhesive layer is obtained by crosslinking a first polymer having a butadiene skeleton portion and a second polymer different from the first polymer in the presence of an organic peroxide.
