Discussed is a liquid crystal display device which provides a simple structure by minimizing structural and optical components. The liquid crystal display (LCD) device can include a liquid crystal display panel that includes a lower substrate and an upper substrate bonded to each other with a liquid crystal layer interposed therebetween; a rear cover that includes a bottom supporter supporting a light source module emitting light toward a bottom of the liquid crystal display panel, an upper supporter supporting a lower edge of the liquid crystal display panel, and a sidewall between the bottom supporter and the upper supporter; a diffusion sheet arranged below the liquid crystal display panel to cover the bottom supporter of the rear cover; and a sheet attachment member provided at the edge of the diffusion sheet and attached to the bottom of the liquid crystal display panel.