The display device includes a display panel, an optical member, a light guide plate, and a bottom member. The optical member includes a body contacting a bottom surface of the display panel and a plurality of foldable parts extending from the first body. The light guide plate overlaps the body and is disposed below the optical member. The bottom member is disposed below the light guide plate and has a plurality of slits, which correspond to the plurality of foldable parts. The plurality of first foldable parts are bent from the first body, respectively inserted into the plurality of first slits, and fixed to the bottom member.