The invention relates to a rotor blade (100) for a wind turbine, having a rotor blade root (102), a rotor blade outer edge (104), a leading edge (106) and a trailing edge (108), The leading edge (106) and the trailing edge (108) define a chord (110), the length of which increases from the rotor blade root (102) to the rotor blade outer edge (104), Chord centre points (112) define a rotor wing centre line (114) running from the rotor blade root (0.102) to the rotor blade outer edge (104) and the rotor wing centre line (114) divides the rotor blade outer edge (104) into a leading edge portion (116) and a trailing edge portion (118), a winglet (120) that extends only along the trailing edge portion (118) being arranged on the rotor blade outer edge (104).