How can we understand prehistoric lithic objects? What meaning should we give them and what view should we adopt to claim access to their significance? How can we reduce and clarify our biases? This article is a proposal to introduce Peircian semiotics to review lithic objects. For a long time, these were apprehended as types, sometimes within evolutionary lineages; however, in this research, knapped stone objects will be perceived through a semio-pragmatic grid and reviewed as signs . The proposed approach is a new way of accessing the fields of technical phenomena of prehistoric communities. This new perception aims at a quest for objectivity, by clarifying the affective, analytical and interpretative a priori as an answer to the sometimes very personal view of the prehistorian on lithic objects. Charles Sanders Peirce’s logical theory of signs or semiotics is contextualized within an ‘artisanal’ reading of prehistoric tools as initiated by Éric Boëda and further developed by Michel Lepot. Through this phaneroscopic/phenomenological vision, the technical object, now a sign-object, is placed in action (semiosis) within a system of signs. This new trajectory is positioned both as a methodological tool and as an innovative milestone in the construction of a more logical episteme in Prehistory, taking lithics both as signs of past human activity and of archaeological representations.