A lamp apparatus may include: a light source having a light source installed therein; optics including an inlet configured to receive light irradiated from the light source, a outlet configured to discharge the light inputted from the inlet and having a plurality of facets formed thereon, and an optical connector connecting the inlet and the outlet; a light guide positioned between the light source and the optics, and configured to guide the light irradiated from the light source toward the optics; and a support configured to support the optics or the light guide.