A total of 200 random samples of mutton and beef (100 of each meat type which were subdivided into 50 from each fore and hind quarters) were collected from butchers shops from El-Beheria province to show their microbiological aspects. The means of counts (cfu/g) of total aerobic bacterial, total Psychrotrophic bacteria, Enterobacteriaceae, Coliforms, Staphylococcus aureus, Mould and Yeast in mutton samples (fore and hind quarters) were 6.5×106±1.4×106 & 5.8×106±1.4×106, 3.2×106±5.5×105&4.6×106±1.1×106, 6.2×105±1.3×105& 6.1×105±4.0×104, 5.0×105± 1.3×105&5.9×105±1.3×105, 2.2×106±1.0×106& 3.89×106±1.1×106, 6.1×104±1.5×104 & 1.6×105±6.0×104, 4.1×104±9.1×103 & 1.2×104±1.9×103 cfu/g respectively. While the means of these microbial counts (cfu/g) in examined beef samples (fore and hind quarters) were 1.4×106±3.3×105 & 9.6×105±1.6×105, 6.5×105±1.6×105 & 1.2×106±2.2×105, 8.5×104±3.8×104 & 2.1×106±9.3×105, 5.8×105±1.4×105 & 3.9×104±1.3×104, 5.9×104±3.5×104 & 1.6×105±7.6×104, 2.2×104±5.8×103 & 1.8×104±3.0×103, 8.6×103±1.4×103 & 2.8×105 ±1.9×104 cfu/g respectively. Coliforms microorganisms were isolated by different percentage from examined mutton (fore and hind quarters) as follow: E.coli (Fecal&Non fecal) 44% and 49%, Citrobacter spp < /em>. 24% and 26%, Klebsiella spp < /em>. 23% and 14% and Entrobacter aerogenes 9% and 11%. While the same microorganisms were isolated from examined beef samples (fore & hind quarters) as 43% and 51%, 28% and 24%, 21% and 19%, 9% and 6%, respectively. Salmonellae could not be detected in both mutton and beef. This study was shown that the examined mutton samples were more contaminated than those of beef. The results were discussed from the hygienic view and compared with the national and international acceptable standards to assess their reliability for consumption.