A display device includes a substrate; a partition wall on the substrate; a light-emitting element located in an emission area partitioned by the partition wall on the substrate and extended in a thickness direction of the substrate; a wavelength conversion layer over the light-emitting element in the emission area, and including a base resin and wavelength conversion particles dispersed in the base resin and configured to convert a wavelength of light emitted from the light-emitting element; and an optical member on the wavelength conversion layer and the partition wall and configured to adjust a path of light output from the wavelength conversion layer, and the optical member includes an optical layer and a first protruding pattern protruding from the optical layer toward the wavelength conversion layer.