A multi-functional side rear view mirror for a vehicle for preventing blind spots for viewers. The multi-functional side rear view mirror includes a housing for mounting to the vehicle, a pair of mirrors disposed in the housing for viewing behind the vehicle, a pair of side marker lights disposed on the housing for continuously illuminating while the external light system of the vehicle is activated for preventing blind spots for the viewers, a turn signal light disposed on the housing for flashing while the turn signal system of the vehicle is activated for preventing blind spots for the viewers, and a brake light disposed on the housing for continuously illuminating while the brake light system of the vehicle is activated for preventing blind spots for the viewers.