This study explored how Finnish university-based subject teacher educators perceive their professional identity as a small group within a larger social context and with a mixed background. The results show that the identities of the subject teacher educators studied here are reconstructed over time, from a subject teacher identity to the identity of a subject teacher educator as an educationalist. However, the subject teacher educators were perceived as educationalists or subject representatives depending on the institutional context. Although the present results indicate that the Finnish subject teacher educators experienced teaching as a central part of their duties, they saw the benefit of engaging in research.