AbstractPeer bullying in schools is well-documented through international research. There is, however, limited knowledge about teachers who bully students and how this is related to peer bullying. In the school hierarchy, the teachers have a strong position of formal power. When this power is exercised positively, through authoritative classroom leadership, this will both prevent bullying and support and protect victims of bullying. However, we cannot neglect the possibility that teachers can use their formal power negatively, and in the worst cases bully students. This study aimed to explore how teacher bullying was associated with being bullied by peers. Data from the Norwegian Annual Pupil Survey (2018) was used. The sample consisted of 173,742 students (48.93% female). The participation rate was approximately 90%. A Likert scale was used to estimate the extent to which students were being bullied by peers and teachers. The main results showed that teacher bullying was positively associated with peer offline and online bullying victimization while statistically controlling for gender and grades. With a rather small effect size, the association of teacher bullying with offline bullying victimization was stronger than with online bullying victimization. Bullying was measured using self-reporting with a single question. In future research, it is recommended that several questions be used to capture the complexity of bullying. The results from this study show that it is necessary to develop and implement preventive measures not only against bullying among peers but also against teacher bullying.