A plaster containing active ingredients for controlled administration of active ingredients to the skin and possessing a rear side and a skin side, has a rear layer, an active ingredient reservoir containing one or more active ingredients arranged essentially perpendicular to the surface of the plaster in contact with the skin, and an adhesive device on the skin side and possibly a covering layer which is detached before application of the plaster. At least one active ingredient reservoir part (12) can be detached on to the skin while one or more active ingredient reservoir parts remain. For this purpose, the part (13) of the active ingredient reservoir remaining on the skin adheres more strongly to the skin than to the rear side (11).
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