To enable spray coating simply and inexpensively.

A cylindrical jig 3 is provided for supporting a frame for a lighting fixture 2 with a circular groove 1 formed in the vicinity of an outer periphery of the top face by being insertion-coupled with the circular groove 1 in a reversed state, and the coating method of the frame for the lighting fixture is to spray coating 4 on inside and outside faces of the frame for the lighting fixture 2 in a state supported by the cylindrical jig 3. Further, the coating 4 is sprayed with a masking plate 6 put on the whole inside face of a convex part 5 corresponding to the rear face of the circular groove 1.