Palavras-chave -Helianthus annus. Déficit hídrico. Características agronômicas. Genótipos.Abstract -With the objective to value the influence of six levels of irrigation in the agricultural performance of two cultivars of sunflower, (Catissol 01 e Embrapa 122 V-2000), was made an experiment at the Experimental Farm, Valley of Curu River,county of Pentecoste, CE. The experimental design adopted was randomized blocks with divided plots, with four replicates. The effect of six levels of irrigation based on percentage of evaporation of class A pan (ECA) by the factors 0.25; 0.50; 0.75; 1.00; 1.25 and 1.50 , was evaluated for the cultivars. The variables, diameter of head, mass of 1000 achenes, potential of production of achenes, content of oil of the achenes, potential of production of oil,were determined. The greater values were achieved by the cultivar "Catissol 01", except for the content of oil of the achenes,higher for the "Embrapa 122 V-2000". There were significant differences between the cultivars in the variable diameter of head and potential production of achenes. The level of irrigation of 533.70 mm (150% of ECA) proportioned the greater potential production of achenes that was of 4,222.76 and 3,948.02 kg ha -1 , and of oil 1,851.55 and 1,760.63 kg ha -1 to the cultivars Catissol 01 e Embrapa 122 V-2000, respectively.