A lighting device may be provided that includes: a heat sink (300); a light source module (200) which is disposed on the heat sink (300), includes a substrate (210) having at least one hole (H1-H6), and includes a plurality of light emitting devices (230) disposed on a top surface of the substrate (210); a power supply unit (400) which is disposed within the heat sink (300) and includes a support plate (410) and a plurality of parts disposed on the support plate (410); and a soldering portion (700) which connects the substrate (210) and the support plate (410). The support plate includes an extended substrate (450) which is disposed in the hole of the substrate. The extended substrate (450) includes a through-portion which has passed through the hole of the substrate. The soldering portion (700) electrically connects the through-portion of the extended substrate (450) and the top surface of the substrate.