The invention relate to a liquid crystal display that can improve heat radiation properties as well as may comply with a slim trend of displays. The liquid crystal display including: a liquid crystal panel; a PCB for light source that mounts a plurality of light sources which generate light illuminating the liquid crystal panel, and supplies operation power to the light sources; a bottom cover that includes a receiving unit of which bottom surface is opened and a seating space of which bottom surface is not opened, receives the PCB for light source, and externally exposes a part of a rear surface of the PCB for light source through the receiving unit; a main PCB that supplies a driving signal to the liquid crystal panel and the PCB for light source; and a panel guide that includes a lamination unit receiving the liquid crystal panel and an insertion space receiving the main PCB in a direction perpendicular to the liquid crystal panel, wherein the main PCB is inserted into the insertion space to be positioned within the seating space of the bottom cover.