The present experiments were conducted in a cucumber (Cucumis sativus L.) field in Ibshwai, Fayoum governorate to evaluate the influence of nitrogen fertilization levels on the population abundance of the main piercing-sucking insect pests that attack cucumber crop during (2018 and 2019) seasons. The cotton aphid Aphis gossypii (Glover, 1877) followed by the cotton whitefly Bemisia tabaci (Gennadius, 1889) showed the largest average numbers at each nitrogen level. Meanwhile, the green sting bug Nezara viridula (Linnaeus, 1758), the cotton mealybug Phenacoccus solenopsis (Tinsley, 1898), the onion thrips Thrips tabaci (Lindeman, 1889) and the leafhopper Empoasca decipiens (Paoli, 1930) had the lowest average numbers in comparison with the other examined insect pests during the two seasons.