A display device includes a first substrate having, defined thereon, an active region and a nonactive region around the active region; an active element layer on a first surface of the first substrate and in the active region; a second substrate facing the first surface of the first substrate, the second substrate being on the active element layer; and an antireflection member on a first surface of the second substrate that faces the first substrate, the antireflection member being spaced apart from the active element layer, wherein the antireflection member includes first, second, third, and fourth refractive layers sequentially stacked from the first surface of the second substrate, refractive indexes of the first and third refractive layers are greater than refractive indexes of the second and fourth refractive layers, and the fourth refractive layer includes aluminum, indium, and/or gallium.