Banding patterns of SDS-protein and isozymes (esterase, glutamate oxaloacetate transminase and peroxidase) were studied to identify two cowpea (Vigna unguiculata) cultivars, two common bean (Phaseolus vulgaris) cultivars and two pea (Pisum sativum L.) cultivars. The results revealed a wide range of variation in SDS protein banding patterns in cultivars of cowpea (δ-vignin, β- vignin and albumin). Low level of polymorphism was detected in common bean cultivars (one band in albumin) and in pea (one band in convicilin as well as one band in legumin). Meanwhile, the banding patterns of esterase revealed slightly higher polymorphism in cowpea cultivars.