A backlight unit comprising: a light guide plate comprising a first surface and a second surface, opposite to the first surface, having a recess (v) formed toward the first surface; and a light emitting device array disposed in the recess (v), the light emitting device array comprising a plurality of light emitting device packages and a board, on which the light emitting device packages are disposed, wherein the light emitting device packages comprise: first light emitting device packages to emit first light in the recess (v) in a first direction; second light emitting device packages to emit second light in the recess (v) in a second direction opposite to the first direction; and third light emitting device packages to emit third light having light output different from that of the first light and/or the second light in the recess (v) in a third direction intersecting the first and second directions, characterized in that the first light emitting device packages are disposed adjacent to a first lateral surface of the recess (v) to emit first light toward a first region, the second light emitting device packages are disposed adjacent to a second lateral surface of the recess (v) to emit second light toward a second region, and the third light emitting device packages are adapted to emit the third light to a third lateral surface of the recess and to the third region, which has an area less than that of the first and second regions. a light guide plate comprising a first surface and a second surface, opposite to the first surface, having a recess (v) formed toward the first surface; and a light emitting device array disposed in the recess (v), the light emitting device array comprising a plurality of light emitting device packages and a board, on which the light emitting device packages are disposed, wherein the light emitting device packages comprise: first light emitting device packages to emit first light in the recess (v) in a first direction; second light emitting device packages to emit second light in the recess (v) in a second direction opposite to the first direction; and third light emitting device packages to emit third light having light output different from that of the first light and/or the second light in the recess (v) in a third direction intersecting the first and second directions, first light emitting device packages to emit first light in the recess (v) in a first direction; second light emitting device packages to emit second light in the recess (v) in a second direction opposite to the first direction; and third light emitting device packages to emit third light having light output different from that of the first light and/or the second light in the recess (v) in a third direction intersecting the first and second directions, characterized in that the first light emitting device packages are disposed adjacent to a first lateral surface of the recess (v) to emit first light toward a first region, the second light emitting device packages are disposed adjacent to a second lateral surface of the recess (v) to emit second light toward a second region, and the third light emitting device packages are adapted to emit the third light to a third lateral surface of the recess and to the third region, which has an area less than that of the first and second regions.