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Effect of anti-rancidity of ethanolic crude extracts from fifteen local edible plants were evaluated in palm oil containing 5 ppm ferric ion. Each plant extract was added into oil sample to obtain the concentration of 350 ppm and stored at 40C for 28 days. The anti-rancidity was evaluated using Conjugated diene hydroperoxides (CD), Peroxide value (PV) and Thiobarbituric acid reactive substance (TBARS). After adding the plant extracts (day 0), some samples had statistically higher in initial CD, PV or TBARS (p>0.05). After incubation, the increases in CD, PV and TBARS were significantly observed in all samples including control and oil sample with BHT 200 ppm. In addition, the oil samples with different plant extracts showed different results either inhibit or activate the lipid oxidation. Oil samples with 2 plant extracts, Gymnema inodorum (Lour.) Decne and Micromelum minutum Wight & Arn showed lower values of CD, PV or TBARS compared to oil sample with BHT (p<0.05). These results suggest that both plants are a promising source for supplement synthetic antioxidant in oil.