A fixing-tool mounting device mounting a fixing tool including a curved surface formed in accordance with a shape of a body surface on a body part of a subject onto the body part of the subject set to a predetermined posture angle, including: a moving mechanism moving the fixing tool in at least one axial direction relative to the body of the subject； an angle adjustment mechanism adjusting an angle of the fixing tool around at least one axis relative to the body of the subject； and a pressure detecting portion configured to, after the fixing tool contacts with the body part of the subject, detect a pressure generated between the fixing tool and the body part.
