This transdermal patch has a support body and an adhesive layer disposed on at least one surface of the support body and containing a drug and an adhesive, wherein at least a portion of the drug is nalfurafine in free-body form.一種貼附劑,其係具有支撐體、與配置於該支撐體之至少單面上的含有藥物及黏著劑之黏著劑層的貼附劑,其中前述藥物之至少一部分為自由體之納呋拉啡。