To prevent an exterior wall panel from falling and to shorten a time for attachment work when fixing the exterior wall panel to a beam material, or to enhance operation efficiency of a wrecker when lifting the exterior wall panel by means of the wrecker.

The upper end 4E of the wall panel 4 is fixed to the beam material 2 via a panel fixing bracket 3. The panel fixing bracket 3 is equipped with an L-shaped cross-section fixing bracket body 5 which has a mounting plate portion 6 extending downward from a fixing plate portion 20 fixed to an undersurface of the beam material, and a horizontal frame material 12a on a top of the wall panel 4 is bolt-fixed by means of a bolt 22 which passes through a bolt-insertion hole 23 provided in the mounting plate portion 6. The mounting plate portion 6 is provided with a hook portion 7 which extends in such a manner as to be inclined upward toward an outdoor or indoor side, and which can temporarily hold the wall panel 4 by hooking the horizontal frame material 12a on the top when fixing the horizontal frame material with the bolt.