Selection of genotypes based on high value of heritability and forecasted genetic conditions would be an effective method for improvement of sunflower lines.The present investigation was carried out to (i) study of some agro-morphologic traits and (ii) to estimate genetic variability parameters for the studied traits in 36 lines of sunflower. Analysis of variance showed that genotypes significantly differed for two studied traits. Genotypic and phenotypic coefficients of variations were high for Thousand Kernal Weight (TKW), Head Diameter (HD) and Leaf Number (LN). Heritability estimates were LN, Days to physiological Maturity (DM) and Seed yield (SY). High genetic gain was observed for TKW, HD and LN. Correlation analysis showed HD was significantly correlated with a trait TKW. High heritability estimates associated with high genetic advance as percent mean (GG) were obtained in characters i.e., TKW, SY, HD and LN.