This book aims at outlining what the Dialectic of Desire is in Lacan. Starting from the analysis of the concept of desire-for-desire, I dwell on considering the function that “the desire for the Other” has in structuring, both in the Logic of Fantasy (or of Unconscious) and in the way the phenomenic representation of the Real is established. Moreover I examine how the classical aesthetic theory, subjected to the Logic of Fantasy, is taken back to an ethic of intersubjectivity and how, within this step, a “topological” redefinition of language and of the space of subjectivity is achieved.