PURPOSE: A light emitting diode device is provided to reduce the weight of the light emitting diode device by forming a hollow part on a heat radiation protrusion. CONSTITUTION: One or more through holes(11a) are formed on a substrate(11). A heat radiation structure is installed on the through hole. A heat radiation plate(15) includes a base and a heat radiation protrusion unit(15b) which is upwardly protruded on the base. A light emitting diode(18) is mounted on the upper side of the heat radiation protrusion. A reflector(21) is installed around the light emitting diode chip.
