Mozzarella cheese is a good source of nutrients namely protein, fat, minerals and vitamins. The study was performed to evaluate the microbiological quality ofMozzarella cheese and it's correlation with Egyptian and International standards. A total of 50 mozzarella cheese samples were collected from supermarkets in Assiut City, Egypt. All samples were investigated to determine the total aerobic plate, yeasts, molds and coliformscounts also, for detection of Staph. aureus, E. coli and Salmonella spp. In the examined samples the incidence of yeasts, molds and coliforms were 94, 32 and 96 %, respectively while, Staph. aureus, E. coli and Salmonella were detected in 24, 20 and 12% of the examined samples. The microbiological results in this study were compared with the limits of Egyptian Organization Standards and International Standards.