Seeds of five cowpea varieties (Dokki331, Tiba, Kaha1, Kafr El-Sheikh and Cream7) were screened for there infestation by two storage bruchids named Callosobruchus maculatus (F.) and C. chinensis (L.) under free- choice and non free-choice methods. The mean number of eggs, the mean developmental period (MDP), the progeny number, the susceptibility index, weight loss (%), damaged seeds (%) and seeds germination (%) are parameters of the evaluation. Results indicated that all cowpea varieties were attacked by both insects. Tiba and Dokki331 were more susceptible, while, the rest varieties were less susceptible. Dokki331 was highly susceptible to infestation by C. maculatu s under free and non-free choice methods. It suffered a higher value of direct weight loss and damage. Cream7 and Kaha1 were partially resistant to both insects. None of the tested varieties were completely tolerant to infestation by the two test insects.