A display device can include a flexible substrate including an active area, a bending area, and an area outside the bending area, the bending area configured to be bent flexibly; a plurality of pixels to display an image in the active area, each of the plurality of pixels including an organic light emitting diode (OLED); at least one signal line and at least one power line disposed on the flexible first substrate, the at least one signal line and the at least one power ling being disposed on a same layer in the bending area; and a planarization layer disposed in the active area and covering the at least one signal line and the at least one power line disposed on the same layer in the bending area, wherein the OLEDs in the plurality of pixels are disposed on the planarization layer.