Green lacewing, Chrysoperla carnea S. (Neuroptera: Chrysopidae), is an important predator of many aphid species such as Lipaphis erysimi and Diuraphis noxia. In biological control C. carnea is most effective predator in controlling of aphid species. The functional response of all larval stages of C. carnea is calculated over a time of 24h at different prey densities (10, 20, 30, 40, and 50). Functional response of three larval instars was calculated using a logistic regression model, where handling time (Th) and attack rate (a) that calculated by using Roger random predator equation. The results revealed that all the predatory stages show a type II functional response and consumption rate increased with the increase in prey density for the first, second and third larval instar of C. carnea on both L. erysimi and D. noxia. It is concluded that as the handling time increases the attack rate decreases. When the third instar of C. carnea fed on L. erysimi its handling time was 0.029h and its attack rate was 1.55h-1, while when fed on D. noxia its handling time was 0.14h and its attack rate was 0.72h-1. This study revealed that third larval instar of C. carnea has great predatory potential for L. erysimi and D. noxia.