It is possible to release a basic drug from a preparation for a long period (1 to 7 days) at a constant and constant concentration, and in addition, even though a large amount of drug is contained in the preparation, Therefore, a percutaneous absorption-type preparation that can be easily reduced in the content and easy to manufacture is provided. The percutaneous absorption preparation has a pressure-sensitive adhesive layer containing a basic drug and a water-soluble polymer, and a support.塩基性薬物を持続的かつ一定の濃度で、長期間(1~7日間)製剤から放出させることが可能で、さらに、多量の薬物を製剤中に含有しているにもかかわらず薬物の経時的な含量低下が少なく、その製造工程も容易な経皮吸収型製剤を提供する。経皮吸収型製剤において、塩基性薬物および水溶性高分子を含有する粘着剤層と、支持体とを有する構成とする。