A liquid crystal display module for preventing noise caused by friction between a support main and a light guide plate is provided. In the module, a hole is defined at a support main having at least one of a polygonal shape or a circular shape. A light guide plate is disposed on the support main. A protrusion which protrudes from a side surface of the light guide plate is inserted into the hole. The protrusion has at least one of said polygonal shapes and said circular shape.