Entrepreneurship in school is a widespread issue within the school system and it is therefore important to problematise teachers and their role when entrepreneurship is emphasized in their school practice. The teachers in this study, from the secondary and upper secondary levels, were all participating in a Swedish three-year school improvement programme on entrepreneurship in school. Based on a questionnaire and interviews, the results were categorized into four main teacher leadership skills: teachership, leadership, professional leadership, and "professionship". This study highlights the importance of teachers' relationship to their students, new thinking about teaching and learning, and subject knowledge.