A lighting device-comprising: a heat sink which includes a receiving recess and a top surface including a hole; a light source module which includes a substrate disposed on the heat sink, a light emitting device disposed on the substrate and a pad disposed on the substrate; a cover which is disposed on the light source module and is coupled to the heat sink; a power supplier which is disposed in the receiving recess of the heat sink and includes a projection outputting a power signal for driving the light source module; and a connector which is coupled to the hole of the heat sink, includes a contacting part (251-1, 251-2) electrically connected to the pad of the light source module, and is electrically connected to the projection of the power supplier, wherein the connector includes a recess to which the projection of the power supplier is coupled and a connection portion which is disposed in the recess and is electrically connected to the contacting part, and the projection of the power supplier includes an electrode plate which outputs the power signal and is connected to the connection portion; characterized in that the light source module comprises: a first light source unit which includes a first substrate, a first light emitting device and a first pad; a second light source unit which includes a second substrate, a second light emitting device and a second pad; and a connecting plate which electrically connects the first pad of the first light source unit and the second pad of the second light source unit. a heat sink which includes a receiving recess and a top surface including a hole; a light source module which includes a substrate disposed on the heat sink, a light emitting device disposed on the substrate and a pad disposed on the substrate; a cover which is disposed on the light source module and is coupled to the heat sink; a power supplier which is disposed in the receiving recess of the heat sink and includes a projection outputting a power signal for driving the light source module; and a connector which is coupled to the hole of the heat sink, includes a contacting part (251-1, 251-2) electrically connected to the pad of the light source module, and is electrically connected to the projection of the power supplier, wherein the connector includes a recess to which the projection of the power supplier is coupled and a connection portion which is disposed in the recess and is electrically connected to the contacting part, and the projection of the power supplier includes an electrode plate which outputs the power signal and is connected to the connection portion; characterized in that the light source module comprises: a first light source unit which includes a first substrate, a first light emitting device and a first pad; a second light source unit which includes a second substrate, a second light emitting device and a second pad; and a connecting plate which electrically connects the first pad of the first light source unit and the second pad of the second light source unit. a first light source unit which includes a first substrate, a first light emitting device and a first pad; a second light source unit which includes a second substrate, a second light emitting device and a second pad; and a connecting plate which electrically connects the first pad of the first light source unit and the second pad of the second light source unit.