A skin treatment apparatus includes a handle body, a driving unit received in a receiving cavity of the handle body, a treatment head unit, and an inlet arrangement. The treatment head unit includes a supporting member provided at the front end portion of the handle body, a treatment cap detachably attached on the supporting member, a treatment shaft rotatably connected to the driving unit and extended from the driving unit into a treatment cavity, and an abrasion head integrally formed at a free end of the treatment shaft in such a manner that when the treatment shaft is driven to rotate, the abrasion head is also driven to rotate with respect to the handle body. The inlet arrangement is formed at the supporting member of the treatment head unit for providing a predetermined amount of skin treatment fluid in the treatment cavity.
