The present invention relates to a lamp for a vehicle and a control method thereof. The lamp for the vehicle according to one embodiment of the present invention includes a light source unit provided with at least two light sources, a reflection unit located between the at least two light sources and provided with a reflector configured to reflect light emitted from the at least two light sources, a lens having a first region and a second region to which direct light emitted from each of the at least two light sources is incident, and a third region to which reflected light reflected by the reflector is incident, the third region different from the first and second regions, and a processor configured to control at least one of the light source unit and the reflection unit such that a size or center position of at least one of the first to third regions changes.