AbstractInterdisciplinarity has become prominent in science policy and academia because of its potential to lead to more interesting, innovative and responsible research. However, its implications for the development of academic careers and identities are not well known, partly because different disciplinary communities regard it differently. Shedding light on how academic identities are constructed and negotiated in the context of interdisciplinary research, this chapter presents a discourse analysis of the biographical narratives that scholars from different disciplines—including mathematics, computer science, economics and archaeology—articulated during qualitative research interviews. The analysis illustrates how these narratives allowed the interviewees to identify themselves as members of specific disciplinary communities, having the personal traits these require, and emphasizing or playing down their interdisciplinary moves accordingly. The findings suggest that individuals’ biographical narratives deserve careful attention because they contribute to the establishment, reproduction and maintenance of academic disciplines. Consequently, they have the potential to make the narratives that constitute the ‘core’ of a discipline become, little by little, more heterogeneous.