PURPOSE: To simplify the structure for mounting an outer wall panel to a continuous footing to achieve reduction of labor in the execution of work thereof.

CONSTITUTION: An outer wall panel P includes a frame 4 provided with threaded rods 3... downwardly protruding therefrom. An extending part 9 projected from the lower end of the outer periphery of a nut element 7 adapted for threaded engagement with the rod 3 is supported by means of a lower fitting 6 comprising a receiving plate 12 adapted to be mounted onto the flat upper surface FS of a continuous footing F and anchor nuts 11 to be screwed onto anchor bolts 10 vertically set on the footing F.