MASSAGE MACHINE In the case of adopting a massage mechanism which is capable of mechanically treating a treatment region ranging from buttocks to thighs, it is ensured to prevent a user from feeling a discomfort feeling at a time of seating on a seat. A massage machine (1) of the present invention includes a seat massage mechanism (5) which is provided inside a seat (2) and performs a massage of a treatment region ranging from buttocks to thighs (treatment region including at least buttocks) of a user seating on the seat (2), and in this massage machine (1), guide means (8) is arranged along a front and rear direction inside the seat (2) allowing the seat massage mechanism (5) to be movable in the front and rear direction. (Figure 4)