Patent ID: 7751197

Claim:
A fastening device comprising: a support having a screw hole; an object to be fixed having a through hole which is aligned with the screw hole, and a fastener which detachably fixes the object to be fixed to the support by being screwed into the screw hole from the through hole, the fastener including: (i) a male screw portion which is screwed into the screw hole; (ii) a gripper coaxially provided with respect to the male screw portion, the gripper being capable of protruding outside the object to be fixed from the through hole and getting into the through hole, and having an end surface on which a concave portion, in which a tool can be engaged, is formed on an opposite side of the male screw portion; and (iii) a stopper positioned between the male screw portion and the gripper, the stopper being radially outward of the male screw portion and the gripper, the object to be fixed being fixed to the support via the fastener and the end surface of the gripper being positioned inside the through hole, in a state in which the male screw portion of the fastener is screwed into the screw hole, and the gripper protruding outside of the object to be fixed from the through hole and the stopper being caught in the object to be fixed and holding the fastener to the object to be fixed, in a state in which the fastener is loosened and the male screw portion is removed from the screw hole.