A backlight assembly includes a light source, a light guide plate, and a receiving container having a combination guide part. The coupling guide part is inwardly protruded with respect to the sidewalls of the receiving container. The coupling guide part corresponds with a guide recess on the light guide plate to guide the light guide plate to a proper position. The coupling guide part may also include a screw thread to couple the receiving container with an external case. Therefore, the receiving container may be easily coupled with the external case and the light guide plate may be guided to a proper position via the combination guide part to thereby simplify a manufacturing process of the backlight assembly and reduce its size.