Provided is an apparatus (1) for treating skin, including: a body (2) including a casing (21, 22) forming a grippable region; electrical means for supplying power, arranged in said body; at least one treatment head (3); at least one light source (4); and at least one light guide (5) having a projection area (51) that is intended to receive the light emitted by the at least one light source (4) and to project at least one light beam intended for a region of skin. The at least one light guide (5) comprises a face opposite said projection area (51), the opposite face comprising distributing means intended to distribute the light over the projection area (51).