A display device according to one or more embodiments includes a display panel, a light source module disposed on a rear side of the display panel to generate light supplied to the display panel, and including a plurality of light sources emitting light, and a printed circuit board (PCB) on which the plurality of light sources is mounted, and a bottom chassis disposed on a rear side of the light source module and on which the light source module is assembled, wherein the PCB includes an insulating layer having a non-conductive, a first conductive layer formed on a lower surface of the insulating layer and having a conductive, and a second conductive layer formed on an upper surface of the insulating layer and having a conductive, and wherein the second conductive layer is formed to have a smaller area than the first conductive layer such that the PCB is convexly bent in a direction facing the display panel due to thermal expansion after a reflow process.