Michel Foucault's work made Pliny's correspondence one of the turning issues towards the so-called self-care, initiated at the beginning of the second century BC. This paper proposes an analysis of the corporal constructions in Pliny's correspondence via the self-representation's process. Its aim is to reconsider the whole places of learning and practice of the body according to a qualitative nomenclature of the 'body-in-representation' suggested by Pliny the Younger (mores, gestures, age).