Totally, 24 bacteria species were extracted and identified. Twenty bacteria species were isolated from the cockroaches’ body surface after having the suspension cultivated. The most predominant species of bacteria was E.coli (26.4%), and the lowest found was Edwardsiella (0.4%).The frequency of investigated bacteria on cockroaches’ body surface was not significantly different between Periplaneta Americana and Blattella germanica except for Kllebsiella Oxytoca (P