The present disclosure relates to a display device. The display device according to an exemplary embodiment of the present disclosure includes a substrate including an active area including a plurality of sub-pixels and a non-active area surrounding the active area; a plurality of transistors disposed in the plurality of sub-pixels, respectively; a plurality of first power supply lines connected to the plurality of sub-pixels; and a plurality of second power supply lines disposed to intersect the plurality of first power supply lines and made of the same material as gate electrodes of the plurality of transistors. Therefore, it is possible to improve the luminance of the display device and suppress the occurrence of mura.