A treatment device for treating the skin, includes a body including a housing forming a gripping area, an electrical supply device arranged in the body, a treatment head including a massage device, a device for maneuvering the massage device, actuated by an electric motor connected to the electrical supply device, a light source, and a light guide having a projection surface for receiving light from the light source and for projecting a light beam towards an area on the skin. The light guide includes a face opposite the projection surface, including a distribution system for distributing the light along the projection surface, and the massage device has an area for contact with the skin to be massaged. The area transmits the light and consists of a thermoplastic elastomer (TPE) material having a light transmission of between 0.8 and 0.9 for light with a wavelength of 590 nm or 630 nm.
