Abstract: A skin treatment device includes a roller rotatably mounted about its longitudinal axis and having needles protruding radially outwardly from its peripheral surface, and a device for establishing electrical contact between at least part of the needles and a voltage source having first and second poles, including first and second terminals capable of being electrically connected to the first and second poles, respectively, a first contacting zone electrically connected to first needles, a second contacting zone spaced and electrically insulated from the first contacting zone and electrically connected to second needles, the terminals and the contacting zones being configured such that when the first terminal is connected to the first contacting zone, the second terminal is likewise connected to the second contacting zone. The first and the second needles are each arranged in a row, the rows being separated from each other in a circumferential direction of the roller.