We report extensive photometry of the dwarf nova QW Ser throughout its 2003 February superoutburst till quiescence .
During the superoutburst the star displayed clear superhumps with a mean period of P _ { sh } = 0.07703 ( 4 ) 
days .
In the quiescence we observed a double humped wave characterized by a period of P = 0.07457 ( 2 ) days .
As both periods obey the Stolz-Schoembs relation with a period excess equal to 3.30 \pm 0.06 % the latter period is interpreted as the orbital period of the binary system .