VEHICLE RADAR UNIT

A vehicle radar unit includes a radar device emitting and receiving electromagnetic waves, and an exterior member. The exterior member includes a light source, a housing including an opening, and a cover covering the opening. The housing includes a bottom wall and an outer wall. The bottom wall includes a projection including an inner wall extending rearward in the emitting direction from an edge of a projection end. The radar device is located at a position separated from the inner wall in a direction orthogonal to a central axis extending through a center of the radar device. An inclination angle of the inner wall, a length of the inner wall, and a shortest distance from the central axis to the inner wall are set so that a tilted angle of a main lobe of the electromagnetic waves is more than 0° and not more than 0.38° in absolute value.