A vehicle which turns in a state in which a vehicle body is banked from an upright state to a first side in a vehicle width direction of the vehicle body, the vehicle comprising: a head lamp which is attached to the vehicle body, and irradiates a head lamp irradiation region (50, 51) set in front of the vehicle body; an auxiliary lamp which is attached to the vehicle body, and irradiates an auxiliary lamp irradiation region (60, 61, 62) set in front of the head lamp irradiation region (50, 51), on the first side in the vehicle width direction; a bank state detecting section which detects a bank state of the vehicle body; and a lighting control section which lights the auxiliary lamp depending on the bank state of the vehicle body, wherein the lighting control section causes the auxiliary lamp to be lighted in a predetermined set lighting state at predetermined luminosity, when the bank state detecting section detects a predetermined set bank state of the vehicle body, and wherein the lighting control section causes the auxiliary lamp to be lighted in a predetermined preceding lighting state at predetermined luminosity lower than the predetermined luminosity of the predetermined set lighting state, when the bank state detecting section detects a predetermined preceding bank state of the vehicle body which occurs before the vehicle body reaches the predetermined set bank state, characterized in that the lighting control section lights the auxiliary lamp in such a manner that the luminosity of the light emitted from the auxiliary lamp is constant in a specified range for a time period from when the preceding bank state is detected until the set bank state is detected. a head lamp which is attached to the vehicle body, and irradiates a head lamp irradiation region (50, 51) set in front of the vehicle body; an auxiliary lamp which is attached to the vehicle body, and irradiates an auxiliary lamp irradiation region (60, 61, 62) set in front of the head lamp irradiation region (50, 51), on the first side in the vehicle width direction; a bank state detecting section which detects a bank state of the vehicle body; and a lighting control section which lights the auxiliary lamp depending on the bank state of the vehicle body, wherein the lighting control section causes the auxiliary lamp to be lighted in a predetermined set lighting state at predetermined luminosity, when the bank state detecting section detects a predetermined set bank state of the vehicle body, and wherein the lighting control section causes the auxiliary lamp to be lighted in a predetermined preceding lighting state at predetermined luminosity lower than the predetermined luminosity of the predetermined set lighting state, when the bank state detecting section detects a predetermined preceding bank state of the vehicle body which occurs before the vehicle body reaches the predetermined set bank state, characterized in that the lighting control section lights the auxiliary lamp in such a manner that the luminosity of the light emitted from the auxiliary lamp is constant in a specified range for a time period from when the preceding bank state is detected until the set bank state is detected.