the sensory characteristics evolution of fried potato (odor, color, crispness, and taste) as a function of two factors: nature of oil and number of frying. Except for color and odor, the reaction improves significantly (p < 0.05) the sensory scores of fried potato after the 15th frying. When evaluating the color of potato chips, similar variation were noticed depending on the nature of oil and the number of frying. The fried products were characterized by a yellow color even after the 15th frying. The odor scores of potato fried using oil with reaction, diminish slowly and reach only 4.8. But no significant difference was observed between samples even after the 15th frying. It should be noted that during frying, a pleasant flavor was detected in oil treated with reaction. This can positively improve the organoleptic characteristics and especially the flavor of the product fried in this type of oil. Unlike synthetic antioxidants, the phenolic compounds of rosemary extract are responsible for the generation of a desirable flavor in the fried product. The intensity of this flavor has a tendency to decrease with the number of frying. The crispness and taste evolution of potatoes fried in oil with natural antioxidant were stable independently of the number of frying. After the 15th frying, a significant decrease (p < 0.05) of crispness and taste scores is observed for the potatoes prepared in control oil compared to those prepared in oil with RE. These are the crispest and retained their fruity flavor even after the 15th frying. An oily feel and a rancid taste were rather detected in potato prepared in control oil by the end of the test. Correlation between sensory attributes was also determined. An important and positive correlation between taste and odor (r = 0.450) was noticed. However, this correlation was more significant when crispiness and taste of the potato crisps were considered (r = 0.518). Regression between acceptability and sensory attributes was discussed in Tortoe et al. study; these authors have also confirmed an important positive correlation between the taste and the overall acceptation of deep-fried yam (Dioscorea rotundata) crisps.