A lighting body for a vehicle includes a housing, an outer lens configured to form a lamp chamber between the housing and the outer lens, a millimeter wave radar disposed outside the lamp chamber and transmits millimeter waves toward a side outward of the vehicle, and a light source disposed in the lamp chamber and emits light toward the side outward of the vehicle through the outer lens, the millimeter wave radar being held in the housing in a state the millimeter wave radar is combined with the housing from an inward side of the vehicle, a first functional membrane allows penetration of the millimeter waves and allows penetration and reflection of the light being formed on the outer lens, and a second functional membrane allows penetration of the millimeter waves and allows at least reflection of the light reflected by the first functional membrane being formed on the housing.