An oil−based plaster preparation which comprises a plaster layer comprising the following ingredients (A), (B), (C), (D), and (E): (A) deprodone propionate, (B) a styrene/isoprene/styrene block copolymer, (C) an ingredient selected among polyisobutylene, polybutene, and styrene/butadiene rubbers, (D) a liquid paraffin, and (E) a tackifier. The oil−based plaster preparation, which contains deprodone propionate, can be applied to a wider range of body parts under a wider range of conditions and can be peeled off without imposing a burden to the affected part.
