In Brumadinho's Municipal Education System, the implementation of School Councils is mandatory. However, even after their implementation, the participation of School Councils in school decision-making processes is still small. The research problem was the need for greater School Council participation in these processes. The aim of this work was to understand the factors that promote and/or hinder the participation of the School Council in the decision-making processes of municipal primary schools in Brumadinho/MG, with a view to organising an intervention proposal to strengthen it, using elements from the social management approach and with a view to local development. A case study was used to analyse the documents that regulate the School Council at national and municipal level, and field research was carried out using interviews with 34 full councillors in eight schools in the municipality of Brumadinho/MG. The data was submitted to the content analysis proposed by Bardin (2011)