A patch preparation capable of inhibiting a deviation in pressure-sensitiveadhesive properties of a pressure-sensitive adhesive layer even elapsing along periodof time until it is used after production and capable of keeping favorablepressure-sensitiveadhesive properties is provided. The patch preparation includes a supportand a pressure-sensitive adhesive layer formed on one surface of the support,and thepressure-sensitive adhesive layer includes: (A) a polymer prepared bycopolymerizingmonomer components including a hydroxyl group-containing monomer and an alkyl(meth)acrylate monomer； (B) a polymer prepared by copolymerizing monomercomponents including a methyl methacrylate monomer and a butyl methacrylatemonomer； and (C) a basic drug, provided that bisoprolol and a salt thereof areexcluded.
