Epistemological beliefs are subjective views about the nature of knowledge and knowing. A large number of research approaches are dedicated to this field. Yet, there is no research investigating the beliefs that pre-service teachers have towards educational psychology, a highly relevant domain for their prospective profession. Based on this theoretical background, two studies have been conducted. In the first study, epistemological beliefs with regard to contemporary educational psychology research and their change during a research-based lecture on educational psychology have been assessed (N = 82). In a second study, the aim was to examine these epistemological beliefs during different phases of a pre-service teacher programme (N = 252). Findings indicate that students entering a programme are already partly aware of the nature of educational psychology. Results also reveal that students' knowledge and beliefs develop during the programme, although the relevance of educational psychology as being a central part future professional practice is not recognized. Findings also imply that especially the trust in scientific quality and the awareness of the importance of this field for teacher training and practice could be enhanced. Possible solutions could include more research-oriented courses and a more reflected integration of educational psychology within the curriculum.