A light device for a vehicle includes an emitting module, a light condensing lens and a light guide. The light guide has a hollow column defining a light incident side and a light output side away from each other, both sides respectively faced to the emitting module and the light condensing lens, and the hollow column in help of the light guide avoiding material degradation phenomena and structure deforming problem and prolonging the life usage compared with other materials such as solid-transparent plastic or silicone.