A liquid crystal display device is disclosed. The liquid crystal display device includes a panel, a first frame, and a second frame. The panel has a side face. At least one first locking hole is disposed on the side face. The first frame includes a first side edge and a second side edge. The first side edge has at least one second locking hole and at least one slot. The at least one first locking hole and the at least one second locking hole are locked with each other via at least one locking element, so as to fix the panel and the first frame. The second frame has at least one hook part used for matching the at least one slot of the first side edge such that the second frame and the first frame can be fixed to each other.