PURPOSE: To provide effective massaging of a user's back by freely swinging a movable body provided with a massaging belt against a supporting axis of a holding body as well as by freely swinging a massaging belt in its running direction and in its crossing direction against the holding body.

CONSTITUTION: When a user receives a massage, after the user lies on the upper side of a cover in his supine posture, a driving source 12 is operated to make a driving belt run reciprocally, and the first holding body 21a and the second holding body 21b are made to interlock with each other by the driving belt. The first holding body 21a runs reciprocally from the back to the waist part of the user and the second holding body 21b runs from the buttocks to leg parts. Thus, the massaging belt 105 provided on the holding body 21a, 21b runs endlessly in the direction opposite to the running direction of the holding body by a contact resistance of the cover. Therefore, protruberances 106 of massaging belt protruberances 105 of a pair of movable bodies 35 provided on the first holding body 21a massage the waist part of the user.