A display device includes a substrate; a partition wall on the substrate; a light emitting element extends in a thickness direction of the substrate and is in an emission area of the substrate partitioned by the partition wall; a wavelength conversion layer on the light emitting element and includes a base resin and wavelength conversion particles dispersed in the base resin and being for converting a wavelength of light emitted from the light emitting element; a light blocking member on the partition wall; a reflective member between the light blocking member and the partition wall; and an optical pattern on the wavelength conversion layer in the emission area and having a shape protruding in an upward direction away from the substrate.