A display device is disclosed. The display device includes a display panel, a frame positioned behind the display panel, a PCB coupled to the frame and including a heating element, and a vapor chamber including an internal space for fluid to flow, wherein the vapor chamber includes a heat-absorbing part in contact with the heating element, a heat-releasing part positioned above the heat-absorbing part and spaced apart from the PCB, and a plurality of lines formed at an outer side of the vapor chamber, wherein the plurality of lines extend in a first direction corresponding to an axis that connects a center of the heat-absorbing part to a center of the heat-releasing part.