A display device includes a display element configured to generate a first color light, an encapsulation member on the display element and including an inorganic layer at an outermost portion thereof, a color conversion layer on the encapsulation member and including a first color conversion part configured to transmit the first color light, a second color conversion part configured to convert the first color light into a second color light, and a third color conversion part configured to convert the first color light into a third color light, and a buffer layer between the encapsulation member and the color conversion layer, wherein a difference in refractive index between the buffer layer and the inorganic layer is about 0.5 or less.