Phenomenology describes the transcendental structures of human experience within its constant relationship with the world. Moments such as affectivity, temporality, corporeality, spatiality, and intersubjectivity thus constitute key elements within this approach. In this context, the following contribution aims to describe an experience of great importance in the works circumscribed in phenomenological psychopathology, namely, the experience of dissociation (_Spaltung_). To achieve this task, our article will have three moments. First, it will present a phenomenological description of the _lived body_ (_Leib_). Second, (...) considering Marc Richir's philosophy, it will outline a genetic phenomenology that reveals the first constitution of the _body schema_ during childhood through _Phantasy_’s labor. Finally, it will present a genetic phenomenology of the _lived body_ that sheds light on the _transcendental origin_ of the dissociative experience. (shrink)