Performance of 26 indigenous/ exotic genotypes of cucumber was studied during Kharif, in randomized block design with 3 replications at Nauni (Solan). Significant differences among the genotypes were observed for all the traits under study, indicating the existence of considerable variability. A large portion of phenotypic variability was observed to be genetic and highly heritable in all the traits except for primary branches per vine. High heritability estimates accompanied with high genetic gain for yield per plant, sex ratio, node of first female flower and vine length indicated additive gene control for inheritance of these traits. Yield per plant had significant and positive association with fruits per plant and primary branched per plant. The traits viz. fruits per plant, fruit weight and fruit length contributed towards yield directly/ indirectly.