PURPOSE: A lamp device is provided to smoothly flow air outside or inside by using an air channel and a cooling fan having one guide. CONSTITUTION: A housing(1) includes two end parts. Each end part has an assembling opening part(11) and an electrical connection unit(12). A heat sink(2) includes partition plates. The partition plates form a first air channel. A cooling fan(3) has a second air guide channel. A light emitting module(4) is connected to the electrical connection unit. The light emitting module is mounted in a substrate.
