A backlight assembly includes a first light guide having a first light incident face, a first light reflective face connected to the first light incident face and having a stepped portion, and a first light exiting face facing the first light reflective face. The backlight assembly further includes a second light guide having a second light incident face corresponding to the first light incident face, a second light reflective face connected to the second light incident face and facing the first light reflective face, and second light exiting face facing the second light reflective face. A light reflective plate is inserted into a gap between the first and second light guides. The first and second display panels, respectively, are installed on the first light guide and the second light guide. The generated light is used more efficiently and the overall thickness of an LCD device is decreased.