The aim of this bachelor thesis is to examine the collaboration between school librarians and teachers in primary school, in order to illustrate how the two professions can work together, how they see their own roles and how they look at the other professionals´ roles. We also discuss earlier studies in LIS concerning collaboration between teachers and librarians. The method of investigation is qualitative interviews with practicing school librarians and teachers, we interviewed three school librarians and three teachers from three different schools in the same county.  As a basis of the discussion and analysis Andrew Abbott's theory of professions is used. The thesis shows that collaboration differs between the schools. The difference in itself depends on the schools principal views of the school library. The professions need to develop their understanding for each other´s roles and competences in order to develop the best possible collaboration.