To enable to make electrical connection between a mounting fitting for mounting a reflector and a lighting apparatus main unit easily without time and effort.

This is a structure in which an engagement member 3a of a mounting fitting 3 is inserted into an engagement hole 1b of a lighting apparatus main unit 1 of metallic box shape with insulation coating on the whole surface by inserting the opening end of the main unit 1 by narrowing and the fitting 3 is fixed to the main unit 1, and a reflector 2 is fitted by a latch 4 to the fixed fitting 3. A cut and rising pawl 3c is provided on the fitting 3 at a position contacting the opening edge of the apparatus main unit 1, and at the same time as the above insertion, the insulation coating at the opening edge of the main unit 1 is separated, and the reflector 2 is maintained at the same potential as the lighting apparatus main unit 1 through the latch, the mounting fitting 3, and the cut and rising pawl 3b of the mounting fitting 3.