To obtain a fastening fixture which enables an attachment operation to be easily performed with no effort even by one person, which can be reliably fastened and fixed, and which can reduce costs.

A fastening fixture includes: a bolt which has a right screw formed at one end and which has a left screw formed at the other end; a jig engagement part which is formed at one end or both ends of the bolt and which enables the bolt to be rotated by means of a jig for rotating the bolt; and right and left screw nuts which are screwed to the right screw at the one end of the bolt and the left screw at the other end thereof, respectively.