Teaching development programmes in Higher Education aim for a learning-centred teaching culture. In a shift from teaching-centeredness to learning-centeredness the teacher's role changes from a bearer of knowledge to a facilitator of learning. This, in turn, influences the academic's professional identity as teacher. Insights into this process of identity development are, however, scarce. The present study explores changes in the teacher identity of eight academics enrolled in a teaching development programme by means of episodic interviews and teaching portfolio entries. Data was thematically analysed. The eleven recurring topics were clustered into thematic fields reflecting three phases of the identity development of academic teachers: 'Taking on the teacher role', 'Settling into the teacher role' and 'Finding a new role as a teacher'. This study suggests that the process of identity development is highly significant for the individual academic and influences teaching development programmes' impact on the quality of teaching.