To easily install a facing material, and keep a scene when clearance (unevenness) is generated between the facing material and a metal fitting in the metal fitting used for installing execution work of the facing material.

When the clearance (unevenness) is generated between the facing material and the metal fitting when installing the facing material, this facing material fixing metal fitting can easily install the facing material, and can keep the scene by fixing the metal fitting by a nail and a machine screw after adjusting the unevenness by a part threaded on a projecting part of the fixing metal fitting and a threaded part of an unevenness adjusting tool of an unevenness adjusting metal fitting.