This study aimed to add to the discourse about possible roles for mentor teachers and how to best support student teachers and mentors in negotiating these roles. The findings indicated that student teachers have clear ideas about what they desire in a mentor teacher. The authors found that some participants preferred emotional support and others wanted instructional support. However, none of the participants wanted socialization.In addition, the authors identified a new interpretation of the mentor teacher role (mentor as gatekeeper) that might be viewed negatively about the function of student teaching for some student teachers.