The experiment was carried out in the experimental field of the College of Agriculture, Al-Qasim Green University, during the spring season of 2021, to study the effect of water stress in some traits of growth and yield and yield component in three sunflower cultivars. A factorial arrangement in randomized complete block design with three replications was used, first factor was included cultivars of sunflower (C1 : ESHAKI, C2 : AQMAR and C3 : SAKHA), the Second factor was included water stress levels : (I1 : 100%, I2 : 75% and I3 : 50%) from field capacity. The C2 cultivar was excelled in all characteristics at 100, 75 and 50% irrigation level on the other cultivars. The results of C2 cultivar in 50% irrigation did not significantly differ on 75 and 100% irrigation level in all study traits except leaf area.
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