Disclosed is a lamp for a vehicle including a first lamp module including a first light source part, and a first lens part that forms a first light distribution pattern with light irradiated from the first light source part, a second lamp module including a second light source part, and a second lens part that forms a second light distribution pattern with light irradiated from the second light source part, and a third lamp module including a third light source part, and a third lens part that forms a third light distribution pattern with light irradiated from the third light source part, the first lens part, the second lens part, and the third lens part are connected to each other to define one body having a light output lens surface including multi-facet lenses formed to be gradually stepped from an inboard side to an outboard side of the vehicle.