To allow adding a sensor function without scrapping an existing lighting apparatus with no sensor, to improve the appearance of wirings, and in addition to allow reducing the man-hour required for the work.

A mounting base 10 for lighting apparatus comprises a human detecting sensor 11 and a light and darkness sensor 12, and with these detection signals, a control unit 111 controls the on/off of a switch 13. A power source line connecting code 15 is connected to a power source line 30a via a connector 114, and a lighting apparatus connecting code 16 is connected to a leading wire 20a of the lighting apparatus 20 via a connector 115.