The present design is that, properly changed depending on the number of the quantities and the user of the PC, which is installed by installing the parts of the upper space of the PC read table for providing to any user selectively divided into a number of single PC on PC read table for libraries also allows to be used as well as to the user, it is provided such a library to install PC's constant quantity to the top surface to the center to provide a PC read table for the library to the user to provide the convenience to install the lighting apparatus in the PC read table for the library to provide a disk in which the PC read table, in a state where a branch having a certain height from the bottom surface via a supporting member coupled to the lower side the upper surface of a number of single PC installed shape and a flat plate member is formed to project toward the upper side in the center of the flat plate member has an outer peripheral surface thereof can After the drilling along a straight direction coupling hole having a guide groove, the point corresponding to the mid-height in a state in which the member on the coupling member and, rectangular shape is formed a plurality of the predetermined intervals erected vertically coupled to said plate member is guided the one end portion inserted selectively inserted into the engaging hole of the engaging member formed on consists of a plurality of side members configured to divide a space on the upper side the plate member in accordance with the fixed.