A light unit comprising: a light guide plate; a light emitting module including a plurality of light emitting devices facing at least one lateral surface of the light guide plate and a board having the plurality of light emitting devices mounted thereon; and a reflective member under the light guide plate, wherein the light emitting device comprises a body having a cavity; a protrusion formed on a portion of top surface of the body; a plurality of lead electrodes (133, 134) in the cavity; and a light emitting diode disposed in the cavity and electrically connected to the lead electrodes (133, 134), wherein the protrusion is disposed on one side of both sides on the cavity, and wherein a top surface of the protrusion is higher than a top surface of another side on the cavity, wherein the protrusion formed on the top surface of the body and the cavity of the light emitting device faces at least one lateral surface of the light guide plate, characterized in that the light emitting device includes a first light emitting device provided at an upper portion of the board and a second light emitting device provided at a lower portion of the board, wherein internal lateral surfaces of protrusions of the first and second light emitting devices (32, 34) face each other so that the lights are guided toward the light incident part of the light guide plate, wherein the lead electrodes (133, 134) comprise a first lead electrode and a second lead electrode, wherein the light emitting diode is disposed on the first lead electrode, wherein the lead electrodes are disposed on a lower surface of the body, wherein the protrusion includes a lower portion having an inclined internal surface and an upper portion having a plane surface. a light guide plate; a light emitting module including a plurality of light emitting devices facing at least one lateral surface of the light guide plate and a board having the plurality of light emitting devices mounted thereon; and a reflective member under the light guide plate, wherein the light emitting device comprises a body having a cavity; a protrusion formed on a portion of top surface of the body; a plurality of lead electrodes (133, 134) in the cavity; and a light emitting diode disposed in the cavity and electrically connected to the lead electrodes (133, 134), wherein the protrusion is disposed on one side of both sides on the cavity, and wherein a top surface of the protrusion is higher than a top surface of another side on the cavity, wherein the protrusion formed on the top surface of the body and the cavity of the light emitting device faces at least one lateral surface of the light guide plate, characterized in that the light emitting device includes a first light emitting device provided at an upper portion of the board and a second light emitting device provided at a lower portion of the board, wherein internal lateral surfaces of protrusions of the first and second light emitting devices (32, 34) face each other so that the lights are guided toward the light incident part of the light guide plate, wherein the lead electrodes (133, 134) comprise a first lead electrode and a second lead electrode, wherein the light emitting diode is disposed on the first lead electrode, wherein the lead electrodes are disposed on a lower surface of the body, wherein the protrusion includes a lower portion having an inclined internal surface and an upper portion having a plane surface.