PROBLEM TO BE SOLVED : To suppress the waste of power resources which occurs related to a lighting apparatus on a display rack because each of the lighting apparatuses on a display shelf cannot be freely turned on/off as an independent unit.SOLUTION : A joint is fitted in a groove, a copper core is fitted in the joint, the copper core is connected to an external power source, and a plurality of rectangular engagement holes are arranged in the lengthwise direction of a grid. An engagement arm 21 is provided to both right and left ends of a holder, an engagement hook 26 is provided at the leading end of the engagement arm, and the engagement hook engages with the rectangular engagement hole in an electric connection display pillar 1. A guide groove 23 is provided to a central part of the engagement arm, and a positioning plug 28 is provided below the guide groove. A conductive copper core is fitted inside a movable plug 22, the conductive copper core is placed in the guide groove, and the positioning plug is fixed in a long hole 27. The left movable plug is connected to a positive electrode of a lighting apparatus, and the right movable plug is connected to a negative electrode of the lighting apparatus. A display rack is fixed to the holder by a screw.COPYRIGHT : (C)2015, JPO&INPIT