In this study, we compared the effectiveness of Sulbactam + Ampicillin compound and Ampicillin against to 1168 clinical isolates by means of disk diffusion technic. We observed that Sulbactam + Ampicillin compound is enhanced and regained the antibacterial activity of Ampicillin against some bacteria such as S. aureus, S. epidermidis and some gram negative microorganisms.