To protect a side gate, a tailgate, a rail and the like from damage by a hook even when fixed to the rail attached to the corner of a loading space.

There is provided a stud fitting 1 including: a fixed part 3 inserted into a groove 6 from the opening 7 of the groove 6 formed on a rail 2 installed on a wall face or a bottom face and fixed in the groove 6; a hook 5 supported on the fixed part 3 rockably around a hinge shaft 4 disposed in parallel with the longitudinal direction of the rail 2; and a rocking restriction means 10 that restricts the rocking angle of the hook 5 with respect to the fixed part 3 to be 0-60° on at least one side, with a plane including the rail 2 and hinge shaft 4 as a reference.