A signal light and rear-view mirror arrangement is constructed to include a circuit board mounted in the back recess of a vehicle rear-view mirror and adapted to control a set of lamps to flash, and a lens covered on the back side of the vehicle rear-view mirror, the lens having a plurality of raised portions protruded from the inner surface and forming a honeycomb-like condensing area adapted to condense and refract light from the lamps, a transparent area surrounding the honeycomb-like condensing area, and a photomask covered on the outer surface of the lens corresponding to the condensing area.