To provide a socket plug capable of easily installing to a luminare, producing at a low cost, and improving a power code fitting.

A socket plug 1 for installing on a luiminare by means of rotation comprises a main body 2 attaching lamp 21 and a handle 15 fitted to the main body 2. In this main body 2, a lamp installing part 5 installing the lamp 21, a luminare installing part 7 installed on a luminare, a handle installing part 11 installing a handle are integratedly formed in a condition in which axis directions of each part stand in a nearly straight line, and a power code 14 is led out from the end of the handle installing part 11 due to feed correct to a lamp 21 installed on the lamp installing part 5. In the handle fitting part 15, a combining part 15 combined with the handle installing part 11 of the main body 2, and a code holding part 17 holding the power code are integratedly formed in an almost L-shape viewed from a side.