[Summary][Problem] To safely and properly correct the pelvis by pressing the coccyx using the weight of a recipient himself/herself.[Solving Means] A coccyx contact treatment member (9a) is placed in a cylindrical casing (7) so as be vertically movable through an elastic member (10). A coccyx contact buffering member (11) made of sponge or the like is provided on the upper end of the coccyx contact treatment member (9a). A recipient straddles and takes a sitting posture on the coccyx contact buffering member (11) to place his/her coccyx on the coccyx contact buffering member (11). In this posture, the recipient slightly lifts his/her legs from the floor to apply his/her weight onto the coccyx contact buffering member (11), so that the coccyx is pushed up from below. At this time, the recipient maintains an erect posture while pressing his/her upper body against a posture holding member (2) and gripping a handle with his/her both hands.
