The present invention provides a cosmetic device having a massage function by rolling a roller disposed to a main body part, a suction function with a suction unit, and a stimulation function by outputting a stimulation signal with the roller. Since these functions can be combined and performed in use, the cosmetic device can synergistically exert an effect of dissolving cellulite of user's skin and releasing fascia. While the cosmetic device is multi-functional, the main body part has a compact structure with the suction unit inside and the roller on a bottom surface that are arranged and integrated, as well as an insertion part formed by a space that can be inserted with a user's hand, and a placement part that can be placed with a palm of the user's hand inserted into the insertion part, allowing the cosmetic device to be easily used by holding with one hand.