A receiving device (8) is fixed to a longitudinal end portion of a bed (2) on which a subject (3) is placed. An antenna cable (7) is wired in a direction of a body axis of the subject (3). These configurations of the antenna cable (7) and the receiving device (8) cause the antenna cable to be consistently located on the body axis of the subject (3), thereby facilitating posture change of the subject (3) while preventing wire breakage of the antenna cable and winding of the antenna cable around the subject, which can result from application of stress on two end portions of the antenna cable.
