Lamp unit and lighting system for vehicle

A lamp unit may be provided that includes: a first substrate (100); a second substrate (200) disposed on the first substrate (100); and a plurality of light sources (300) disposed on the second substrate (200). At least two light source arrays (310, 330) are provided, in each of which a plurality of the light sources (310-n, 330-n) are disposed in a row. At least a first light source array (310) and a second light source array (330) among the light source arrays are individually driven.