A vehicle lighting unit can include a solid light guide having a light exiting surface, a reflection surface opposite to the light exiting surface, and a light incident surface through which light enters the light guide so that the light reaches and is internally reflected off the light exiting surface, then is internally reflected off the reflection surface, and exits through the light exiting surface. An LED light source can be disposed to face towards the light incident surface. The reflection surface can include a plurality of divided reflection regions, and the reflection regions can include at least one reflection region disposed at a reference position and at least one reflection region disposed at a position closer to the light exiting surface than the reference position.