Based on ethnographic material relating to the Wari’ (Rondônia, Brazil), this article questions some of the presuppositions concerning native conceptions of the body present in contemporary anthropological literature by exploring a central dimension of Amazonian corporality – one that has been little explored in ethnographic works on the region – its unstable and transformational character. This dimension only becomes evident when our analysis presumes an expanded notion of humanity – first called to our attention by authors such as Lévy-Bruhl and Leenhardt – that includes not only those beings we think of as humans, but also other subjectivities such as animals and spirits. Central to the problem's development is a discussion of the relations between body and soul, humanity and corporality.