A back-light assembly capable of preventing light leakage and a liquid crystal display including the same. The back-light assembly includes a lamp emitting light, a lamp holder comprising a reflecting part into which the lamp is inserted and an absorbing part, wherein the absorbing part absorbs the light, and the reflecting part reflects the light, a side member comprising a through hole, the lamp being inserted into the through hole, and a bottom chassis comprising a bottom surface and side surfaces, the side surfaces extending from the bottom surface.