Background: Limited numbers of studies were published from middle east countries on the eruption age of teeth. Therefore, the information utilized in the academic and clinical situations on the eruption time of teeth in middle east countries is still based on american and european standards. Objectives: This study was conducted to determine the eruption dates and the sequence of eruption of primary teeth in a group of Egyptian children in Cairo Governorate, as well as to compare between age groups by sex and by archesand to correlate the chronological and developmental ages of eruption of primary teeth to the standard range relying on Mchdonald, Avery and Dean, 2011. Methods: The study sample consisted of 2000 healthy Egyptian children of both sexes from Cairo Governorate, the children were randomly selected from children attending Maternal and Child Welfare centers and public hospitals. Results: The first primary tooth to erupt was the lower central incisor and its mean age of eruption was 15.96 months in boys and 16.44 months in girls. Conclusion: Updated population specific standards for Egyptians should be the basis for diagnosis, treatment planning and preventive programs upon which orthodontists and pediatric dentists can rely on.