The work which is the subject of this study is entitled «perception of mothers on the circumcision of their children in the Ngezi district». To achieve this objective, we used the ethnographic method, supported by the interview guide. The results obtained show that: - The mothers interviewed consider circumcision mainly as an act of purification, often recommended by institutions religious such as the Church; - The main reasons given by participants for circumcising their children include preventing urinary infections and reducing the risk of sexually transmitted diseases; - In today’s society, circumcision is seen as a social requirement, contributing to well-being and the integration of the child into their social environment; - The decision to circumcise their children is mainly based on aesthetic and hygiene considerations. Indeed underlines that they prefer to circumcise their children so that their penis takes a «good shape»; - The study revealed a diversity of concerns among respondents regarding the potential risks for their uncircumcised children. Some respondents believe that the absence of circumcision could increase the risk of infection of the foreskin and still others think that there is a risk of developing phimosis. This is why it is very important to do circumcision in a boy child. To prevent certain risks.