The aim of the invention is to simplify the handling of a skin treatment device (1). This aim is achieved, according to the invention, in that a ring (10), on which a carrier material for an active substance is impregnated, is plugged on the cap (5) of the device, which forms the skin electrode (4). Said carrier material preferably has the shape of a strip (13) and is stretched over the head of the cap (5), which is placed on the skin. As a result, an exactly metered quantity of active substance is located between the skin electrode (4) and the skin. Since the arcs (12) of the oval ring (10) are exposed, the latter can be gripped there without the hands being smeared with the cream carrying the active substance. The rings (10) having the impregnated carrier materials are provided in blisters (20).
