This work was carried out on two samples of Acacia salicina oils extracted from arils and seeds by a soxhlet apparatus. The antioxidant activity was determined by the DPPH method and the total polyphenol content was measured by the Folin-Ciocalteu method. Gas phase chromatography revealed the fatty acids contained in these two oils. Oil yields were estimated at 47.06% for arils and 10.9% for seeds. The measurement of the antioxidant activity revealed that the two oils have an interesting antioxidant power. The highest activity was recorded for aril oil (0.15 10-3 µg/ml). The total contents of polyphenols were estimated at 0.10 g GAE/ml for the oil of the arils, 0.10 g GAE/ml and an average content of 0.044 g GAE/ml for the oil of the seeds. The analysis of the fatty acid composition showed that both the seed and aril oils are rich in the same fatty acids which are the linoleic acid, oleic acid and linoleic acid and palmitic acid.