Disclosed are a lamp for a vehicle and a vehicle including the same. A lamp for a vehicle includes a lamp housing, a light source unit mounted on the lamp housing and that irradiates light, a bezel installed in the lamp housing, an optical fiber fixed to the bezel, coupled to the light source part, and that outputs the light irradiated from the light source part, and a tension unit provided in the bezel, and that applies a tension to the optical fiber in a state, in which the optical fiber is fixed to the bezel.