The present invention concerns a skin treatment device for professional and private use. In particular the present invention concerns a skin treatment device comprising a drive unit and an attachment, the drive unit comprising an output element and a rotary support element rotating about an axis of rotation, the rotary support element comprising protrusions, the attachment comprising a skin treatment element and a chassis for the skin treatment element, the chassis comprising a multitude of recesses to cooperate with the protrusions of the rotary support element of the drive unit, wherein the chassis can be supported by the rotary support element and wherein the protrusions can be brought into an engagement position with the recesses, while the chassis is supported by the rotary support element, and the protrusions can be brought into a disengagement position with the recesses, while the chassis is supported by the rotary support element.