Abstract:This study was designed to determine the influence of extracted oil of Cuminum Cyminum on the chemical properties of reused Sudanese edible oil (sunflower oil). Green cumin oil was extracted from its mature seeds by water-steam distillation process. The chemical profile of cumin oil was detected by using GC-MS. The analysis showed that the chemical constituents of oil were; monoterpens percentage was 33.09% and oxygenated monoterpens percentage was 66.91%. Chemical properties of sunflower oil were tested before and after several repeated cooking processes, and after addition of extracted cumin oil. The cumin oil had positive effect on the chemical properties values; peroxide, acidity, free fatty acids value and there were significant differences for these three properties (p ˂ 0.05). The study was attributed the high effect of cumin oil on the chemical properties mainly to antioxidant constituents in the extracted oil monoterpens and oxygenated monoterpens.