To provide a plaster which reduces time for an insomniac patient going out to a medical organization to undergo medical treatment and a burden on the patient's body and prevents feared adverse reaction by dosing an insomnia treatment drug.

This plaster is constituted by orderly laminating a first substrate layer, a synthetic resin layer containing a far infrared radiating body and a bioelectric current improving agent, a second substrate layer, an adhesive layer, and a release sheet, or by orderly laminating a first substrate layer containing a perfume, a synthetic resin layer containing a far infrared radiating body and a bioelectric current improving agent, a second substrate layer, an adhesive layer, and a release sheet.