The bacteria producing beta-lactamases extended spectrum are the leading cause of treatment failure observed in the treatment of bacterial infections. This study aims to evaluate the antibacterial effects of extracts hexanical, 70% methanol and aqueous leaf Spondias mombin (Desr.) A. Juss. (Anacadiaceae) on six clinical isolates of Enterobacteriaceae producing beta-lactamases with extended spectrum (ESBL) and a reference strain. The study of the antibacterial activity of the extracts was performed by the medium diffusion method and agar dilution Mueller-Hinton. For phytochemical screening extracts, chromatographic characterization method thin layer was used. It emerged from this study that the aqueous and hydro-alcoholic extracts are actives. They are bactericidal for the majority of tested strains with MICs ranging from 0.39 to 1.56 mg / mg for the 70% methanol extract and 0,39 to 3.125 mg / ml for the aqueous extract. The phytochemical screening revealed a wealth of secondary metabolites such as saponins, tannins, flavonoids, sesquiterpenes, polyphenols, coumarins may be beneficial in the treatment of many diseases in Enterobacteriaceae.