Abstract: A LCD module comprises a LCD cell, a back light module and a pair of fastening structure including the first frame and the second frame, both capable of joining one with the other. The first frame, which can support the back light module, has a first locking mechanism on its edge, and the second frame, which is around the side of the display area of the LCD cell, has a second locking mechanism adjacent to its edge. By the combination the first locking mechanism and the second locking mechanism, the LCD cell and the back light module can be fastened together.