The aim of my contribution is to analyse the role that common sense has played in Umberto Eco’s work. After making clear the distinction between good sense and common sense, and highlighting a number of differences with the Scottish philosophy of common sense, I will consider the uses and functions that common sense assumes in Eco’s philosophy: namely, a phenomenological function, a regulatory function and a communicative function. I will demonstrate how the characterisation of common sense in Eco emphasises the (...) importance of the historical dimension of Sens, the importance of the public and social dimension of semiosis, and how common sense plays a fundamental, pragmatic role in the disposition to act, whilst revealing the importance of the Peircian lesson and Eco’s consonance with Peirce’s positions. (shrink)