A display apparatus includes a substrate including a display area and a sensor area, the display area including main pixels and the sensor area including auxiliary pixels and a transmission area, a plurality of display elements included in each of the main pixels and each of the auxiliary pixels, a first stack structure overlapping the plurality of display elements, a second stack structure overlapping the transmission area, and a thin film encapsulation layer covering the first stack structure and the second stack structure, wherein the first stack structure has a thickness that is different from a thickness of the second stack structure.