A display device includes a first substrate, a second substrate, and a liquid crystal layer. The second substrate faces the first substrate. The liquid crystal layer is disposed between the first substrate and the second substrate. The liquid crystal layer includes liquid crystal molecules having negative dielectric constant anisotropy and an additive. The additive may be 2,6-di-tert-butyl phenol in which at least one position of a 3-position, 4-position and 5-position is substituted with a substituent.