The purpose of the current study is to present the Fraternity Campaign as one of the big expressions of the Brazilian Church in the service of life. In order to achieve its objective, the study uses the SEE-THINK-ACT method and initially relates the Campaign mentioned to the different challenges imposed to the Church which have justified its creation, either within a local scope, in Rio Grande do Norte, or within a national scope, taking into consideration the national as well as the ecclesiastical junctures. Later the reflection shows the development of the Campaign and the factors which influenced its structure and its methodology. An ecclesiological approach is presented as a theological illuminative, having as main reference the Second Vatican Council and its consequences, with special focus on the Church models presented by Avery Dulles and put into context in Brazil by Fr. José Martins, and on the Theology developed in Latin America, always considering the ecclesiastical and socio-economic juncture elements which have influenced ecclesiology. The National Conference of Brazilian Bishops conducts the Fraternity Campaign every year seeking answers to current problems in Brazilian reality, those which cause grief, pain and death. The Fraternity Campaigns carried out in the new millennium show that the Brazilian Church is a serving Church, that tries to rescue the value and dignity of human beings. Therefore, the Brazilian Church is in the service of life through the Fraternity Campaign.