Volunteers are perceived as an important link in the inclusion of migrant students in schools, when institutions cannot take care of this on their own. For the theoretical part of the article systematic literature review was done, starting with 15,826 initial results, systematically reduced to 15 sources included in the theoretical part. The article discusses the role of volunteering in the inclusion of migrant students in schools and pay special attention on the results (reasons/need to volunteer) within the RoMigSc project. While the results show that volunteers expect personal benefit (e.g. career advancement), most of them are also internally (e.g. concerned for the disadvantaged ones) and externally (e.g. people close to them also volunteer) motivated. Future research, and especially practice shall consider recruiting internally motivated volunteers to work with migrant students. Although personal benefits can also increase volunteering, internal motivation is one of the leading factors.