A lighting device includes a housing, at least one reflector disposed inside the housing; and a light source unit being disposed inside the housing and emitting light toward the reflector, wherein the light source unit includes a light emitting groove formed therein, the light emitting groove including a basal surface sloped toward the reflector, and wherein a plurality of light emitting devices are disposed sloping along the basal surface in the light emitting groove, and wherein the light emitting groove includes a projection part formed from the basal surface, the projection part blocking the light emitted directly from a plurality of the light emitting devices to the outside of the housing.