The invention provides a massager, when a seat part of the massager is inclined due to the expansion of an air bag, the load is reduced relative to the air bag, and the expandable stroke of the air bag is shortened. In the massager provided with the seat part (2) holding the buttock of a patient, which is inclined by using an oblique fulcrum (21) at the rear side of the seat part to change the angle of the seat part (2), a pivot of an auxiliary leg (3) for inclining the seat part before the oblique fulcrum (21) is supported to be lifted on the seat part (2), and the auxiliary leg is connectedwith the air bag (41).