The amount of penetration into the skin in adhesive patches generally tends to show a certain peak and trough. An adhesive patch is provided in which the drug shows satisfactory penetrability because of a polymer proportion and drug penetration is constant over a certain period. The adhesive patch for external use has a pressure-sensitive adhesive layer containing a drug. It is characterized in that the pressure-sensitive adhesive layer comprises: polyvinylpyrrolidone and/or a copolymer of monomers including vinylpyrrolidone as the main ingredient and a (meth)acrylic ester copolymer having a basic nitrogen atom and/or cationic nitrogen atom.
