According to one embodiment, a light emitting device includes a light guide plate, a prism sheet, and a lenticular lens, wherein, a plurality of first protrusions of the light guide plate are arranged along a first direction and extend along a second direction intersecting the first direction, a plurality of second protrusions of the light guide plate extend along the first direction and are arranged along the second direction, the prism sheet includes a plurality of third protrusions extending along the first direction and arranged in the second direction, and the lenticular lens includes a plurality of fourth protrusions arranged along the first direction and extending along the second direction.