The prevalence of Mycoplasmosis in diseased and apparently healthy camels (in contact) was studied in consideration of the effect of season, age, sex and locality in relation with mycoplasmas, Mycoplasma bovis and Mycoplasma bovirhinis isolation rates. It was significantly higher during summer than winter and the most susceptible age group was from five to ten years except diseased group with mycoplasmas and Mycoplasma bovis infections. Male camels were found to be more susceptible to Mycoplasmosis than she-camels and higher prevalence in samples obtained from El-Basateen abattoir than those obtained from the Northwestern coastal zone of Egypt except only diseased group with Mycoplasma bovis infection in which the prevalence was higher in she-camels and at Northwestern coastal zone.