This study deals with the quality requirements that are needed for teacher educators. The tasks teacher educators have to do and the competencies they should possess (a professional profile), according to their fellow teacher educators, were identified. On the basis of a literature search on tasks and competencies of teacher educators, we made a first overview of tasks and competencies. Next, we conducted a Delphi study in three rounds, during which we held open-ended interviews and sent out two rounds of questionnaires. The resulting profile consists of five task areas and four areas of competence. For university-based teacher educators, a sixth task area (carrying out research) has been added.