A display apparatus is disclosed. The display apparatus includes a display panel and a gate driving circuit. The display panel includes a base substrate and a switching transistor. The base substrate includes a display area displaying an image and a peripheral area surrounding the display area. The switching transistor includes a first gate electrode disposed on the display area, a first channel disposed on the first gate electrode, and a first source electrode and a first drain electrode being spaced apart from each other with respect to the first channel. The gate driving circuit includes a driving transistor integrated on the peripheral area of the display panel applying gate signals to the display panel. The driving transistor includes a second gate electrode disposed on the peripheral area, a second channel disposed on the second gate electrode, and a second source electrode and a second drain electrode being spaced apart from each other with respect to the second channel, wherein the second channel includes a first active layer and a second active layer disposed on the first active layer, and a thickness of the second channel is greater than a thickness of the first channel, improving reliability and lifetime of the display apparatus.