A pixel includes: a via layer disposed on a substrate; a first electrode disposed on the via layer; a pixel defining layer disposed on the first electrode, the pixel defining layer including an opening exposing a portion of the first electrode; an emission layer disposed on the portion of the first electrode and the pixel defining layer; and a second electrode disposed on the emission layer. The first electrode includes a first layer disposed on the via layer and a second layer disposed between the first layer and the pixel defining layer. The first layer includes a plurality of sub-insulating layers, each of the plurality of sub-insulating layers including a first sub-layer and a second sub-layer that are sequentially stacked. The first sub-layer and the second sub-layer have different refractive indices.