Cucumber is one of the most wide spreading vegetable crops that grow under greenhouse conditions and attacked by many harmful sucking pests which causing high damage and reduction in yield. This study aimed to determine the susceptibility of two cucumber cultivars to three piercing sucking insect pests, such as; white fly, cotton trips and cotton aphid. This study indicated that there was no significant differences between the mend of infestations with  Bemisia tabaci . Thrips tabaci and Aphis gossypii during the two seasons (2016/ 2017 and 2017/2018) of the study on the two cultivars (Hesham and Newsun. Further, the highest mean infestations with B. tabaci and T. tabaci were recorded during the second season of the study; this means that Hesham var. recorded the highest B. tabaci and T. tabaci infestations comparing with newsun var.  While for A. gossypii there was no significant difference between the mean infestations on the two varieties during the two seasons. Overall, results indicated that Hesham var. was less susceptible than Newsun var. against three piercing sucking pests.