Four hybrid cultivars of sunflower were tested for growth cheracters and productivity under three plant densi ties at the Experiment and Research center of the Faculty of Agriculture at !1oshtohor. Zagazig University in 1990 and 1991 seasonS. Cultivars were Alia, Pioneer 452. Pioneer 6431 and Pioneer 552. Plant stands/fad were 35000 (Dl), 23333 (D2) and 17500 (D3). Resullts showed significant to highly significant differences among cultivare in plant height, number of leaves/plant, head diameter and lodging percent age. pioneer 6431 and Pioneer 552 were associated with high percentages of lodged plants. Also, high percentage of empty heads were associaled with Pioneer 6431 and Pioneer 552. However, the three cultivare of Pioneer gave significantly higher weight per head and achenes/héad than Alta. Pioneer 552 excelled, other varieties in 100—achene weight. As for yield of heads/fad, achenes/fad, Alia exçelled other culti vare in both traits. Oil percentage showed no significant differences, however, oil yield for alta was significantly the highest. Results on stands show that sonic growth characters dif fered significantly with stand. Plants grown under (D3) were shorter, of thicker stem, less ability to lodge and gave less empty heads. Weight of head, and achenes/ head were superior under (D2). However, the highest head/yield, achenes yield/fad and oil yield/fad were those obtained from (Dl). The interaction of dinsity x variety was significant for the characters empty heads Percent. head weight achenes/ head 100—achene weight yield/fed and achene yield/fad.