Discussed is a display device that may include a receiving case having a bottom surface, a case sidewall, and a sheet supporting groove prepared in the case sidewall; a backlight unit including an optical sheet part with a sheet fixing portion received in the receiving case and disposed in the sheet supporting groove; a display panel disposed on the backlight unit; a guide frame for supporting rear edges of the display panel and surrounding the case sidewall; and an optical control member confronting an outer surface of the optical sheet part with the sheet fixing portion.