This paper conducts a qualitative examination based on interviews with four high school librarians. The purpose is to illustrate their professional role in proportion to that of the teachers from working with students’ reading comprehension and from their role, if any, in the school’s educational activity. The work is based on the following questions:- How does the high school librarian describe his or her work to increase the students' reading comprehension and contribute to their reading development?- How does the high school librarian describe his or her involvement in the schools’ educational activity?- How can one understand the high school librarians' relation to the teachers with reference to the librarians’ jurisdiction and the formal and actual legitimacy of the school library profession?The theoretical framework constitutes of the concept of jurisdiction and of formal and actual legitimacy. The result of this study showed that all four librarians strive for an emancipatory working method. It also showed that some of the school librarians find it difficult to be part of the educational activity, while others state that they have a welldeveloped cooperation. The lack of cooperation may be due to lack of time and a stressful working climate. As regards to the relations between the librarian and the teachers, the study showed that the librarians have both formal and actual legitimacy, although to different extents. A lower extent of actual legitimacy, for example, may result in lesser degree of involvement in the educational activity. / Program: Bibliotekarie