When generating electricity by rotation of a roller to cause a light emitting part to emit light, the rotation of the roller became heavy due to the load thereof, causing the massaging feel to be dull. A rod-shaped roller (30) with a polygonal cross section is rotatably joined to a handle (10) around an axis of rotation (ax) which runs along the longitudinal direction of the roller, and light emitting parts (32B-1 to 3, 32D-1 to 3, 32F-1 to 3) provided on side faces (31B, 31D, 31F) of the roller (30) are made to emit light by a built-in battery contained in the roller (30) or the handle (10). Iontophoresis is also possible by attaching iontophoresis electrodes to the sides of the roller and energizing them.