Background:Maxillary labial frenum is a normal structure that have many types of classifications according to morphology and morpho-function.  Every type increase prevalence at specific age and gender. Aim: To determine the prevalence of labial frenum types according to morphological and morpho-functional classifications among a group of children in Mansoura city regarding their age and gender. Methods: A cross-sectional study was conducted over a period of one year. A sample of 2004 children aged 6 to 12 years old of both gender were selected from 8 primary schools of both educational districts in Mansoura city. Types of maxillary labial frenum were determined according to two different classifications (placeck and sewerin). All data were collected and statically analyzed by using the computer program SPSS (Statistical package for social science) version 23.0 Results: The most prevalent frenum attachment type was the gingival type according to Placeck classification. There was high a significant difference between age and gingival, palatal and palatal penetrating frenum types and no significant difference in mucosal type. Simple (normal) frenum type was the most prevalent frenum type according to Sewerin classification. Significant difference was clear between age and all of simple, bifid and recess Sewerin frenum attachment types. In relation of Sewerin frenum attachment types with gender there was no significant difference. Conclusion: Most of children in this study had gingival frenum attachment type according to Placeck classification and Simple frenum attachment type according to Sewerin frenum classification. There was relation between types of frenum and age. Gender had no effect on frenum attachment types.