Poulista and Xera are the most important snap bean cultivars growingunder El- Fayoum conditions, for both local market and export. Antioxidantsubstances are organic compounds, i.e., organic acid or hormones. Recentstudies concentrated on the beneficial effects of these antioxidant substances toimprove plants performance. Therefore, an experiment was carried out duringthe fall seasons of 2016 and 2017 in a private farm at El-Fayoum Governorate,Egypt to study the effect of 7 antioxidant substances, i.e., indole -3- acetic acid,indole -3- butyric acid, ascorbic acid, citric acid, salicylic acid, tartaric acid andoxalic acid as a foliar application, each at the rate of 500 ppm, on growthcharacters, green pods yield and pod qualities of Poulista and Xera plants.Seeds of both cultivars were sown in September; experimental design was spiltplot. Antioxidant applications were done after 20, 30 and 40 days from plantingand plant samples were taken after 50 and 70 days for growth characters and forgreen pods yield and quality parameters, respectively. Results showed that Xeravariety was the higher in pod length, pods weight/ plant-1, chlorophyll a, b andtotal chlorophyll content in leaves and amino acid content in pods comparedwith Poulista variety. Moreover, Poulista variety was higher in plant height,carbohydrates content in stem and pods and amino acid content in stemcompared with Xera cultivar.All foliar antioxidant applications significantly increased all growthcharacters, pods yield and pod quality and chemical composition of carotenoids,chlorophyll a, b and total chlorophyll, as well as, carbohydrates and amino acidcontents in leaves, stem and pods of snap bean plants compared with the controltreatment. The superior application was oxalic acid followed by ascorbic acid,respectively, while citric acid gave the highest content of amino acid in stem.The remarkable growth and production improvement in Xera or Poulistacultivar obtained when plants treated with oxalic or ascorbic acid 3 times (20,30, 40 days) from planting at the concentration of 500 ppm.