A backlight assembly includes a light-generating unit, a heat-radiation member, a first receiving container, and a second receiving container. The heat-radiation member is disposed under the light-generating unit and radiates heat generated by the light-generating unit. The first receiving container is composed of a bottom portion and side portion extended from the bottom portion. The first receiving container has an opening formed through partial removal of the bottom portion so that the heat-radiation member received inside is exposed. The second receiving container is disposed under the first receiving container. An air layer is formed in between the first and second receiving containers.