Structural phenomenology is both a general theory of experience and a scientific method, whose contours and potentially considerable explanatory power have been obscured by its complex historical genesis. Barring a few partial or indirect attempts (e.g. Holenstein 1976, Piana 1996, Coquet 2007, Groupe µ 2015), no direct analysis and certainly no synthetic account of its core tenets have of yet been provided. Indeed, structural phenomenology has never been framed explicitly as a coherent tradition, theory or model in its own right. Rather, the term seems to refer only to the indefinite conceptual space where structuralism and phenomenology have on occasion intersected. Given that Edmund Husserl, Gestalt psychology, Roman Jakobson, Maurice Merleau-Ponty or Jacques Derrida all provide examples of productive convergences or intersections between these two traditions, it is nonetheless clear that what one might want to call « structural-phenomenological thought » constituted not a fleeting or marginal episode in 20th Century intellectual history, but a persistent undercurrent. As we hope to make clear, moreover, it is possible not only to identify a number of common ideas in the nexus of exchanges between phenomenological and structuralist approaches, but also to distill these ideas into a set of consistent principles that in turn provide an outline of structural phenomenology as a coherent theory and method.