Several hybrids of sunflower (Helianthtus annuus L.) were evaluated for resistance to grey mould, caused by Botrytis cinerea Pers., and their potentials as possible sources of resistance were determined. Cultivars were subjected to nitural infection and inoculation in field and growth chamber experiments, respectively. The results obtained showed highly significant (P<0.001) differences in disease severity between cultivars. However, no genotype was completely resistant. A number of cultivars express low levels of susceptibility, particularly the hybrid 'NS-H-45'. The evaluation of S1 progeny and single-plant-progenies of this cultivar revealed that selection for low level of susceptibility and hence breeding for resistance is possible.