The invention provides an adhesive sheet for adhesion to the skin, as well as a transdermal absorption preparation containing the adhesive sheet and a drug or a pharmaceutically acceptable salt thereof in the adhesive layer of the adhesive sheet. The adhesive sheet comprises a support and an adhesive layer formed on the support, wherein the adhesive layer contains at least a thermoplastic elastomer, and more than 300 parts by weight of liquid paraffin per 100 parts by weight of the elastomer, and wherein the adhesive layer contains not more than 10 wt % of a tackifier.
