The school is a place where people with diverse religious beliefs coexist. The presence of religion in school goes through several factors, such as the presence of religious teaching. But it also goes through the religious conceptions that the school actors have and how they deal with religion in the school space. In this research, we investigated the relationship between school and religion through a study that involved 10 schools in the South Zone of Rio de Janeiro, in two stages, during the years 2017 and 2018. We applied a questionnaire in the 10 schools during the year 2017 and we chose one to conduct observations and interviews in the year 2018. The survey results indicate that there is a variety of religious conceptions among school actors. However, it is possible to notice that intolerant conceptions are present in a part of the students and that the religions that they belong to have influence on these conceptions. It is also possible to indicate that this is not a theme that is a central concern in the school environment. We conclude that more research on this discussion is essential to better understand this issue.