To provide a roller massager improving facial treatment, skin treatment or health effects by activating negative free electrons emitted from thick and high-purity germanium.

This roller massager is provided with a thick-germanium roller body 3 rotatably installed therein, a grip member 5 retaining the roller body 3, and a heater disposed inside a cylindrical roller body 3; the roller body 3 is heated to a prescribed temperature by the inside heater; and the roller body is pushingly applied to a user's skin and rotationally turned for a prescribed time.