The present work aims to think about the place of the concept of negativity within the philosophy of Gilles Deleuze, often nicknamed as a philosopher of affirmation. Concepts such as joy and positivity were used in the constitution of an interpretive canon of joy, according to Andrew Culp s denomination, which confuses Deleuzian primacy of afirmation, as an index of univocity or immanence of a transcendental difference underlying being, with an unrestricted exclusion of every negative element from his system. In this sense, our pretension is twofold: on the one hand, starting from the general definition of the concept of univocity, to demonstrate in which way the indicated interpretations, called affirmationists, by neglecting, in Deleuze, a specific sense of negativity related to his concept of creation, reproduce a certain sense of dogmatism, emphatically criticized by the author. The figure taken by Deleuze, in these interpretations, risks being itself made one of the avatars of what the author called philosophical common sense. On the other hand, we try to define a first way of conceiving this so-called negativity, what includes different conceptual efforts. First, an exhibition of readings that also conceive, in Deleuze, space for the negative; second, the thematization of the relationship between Deleuze and Hegel, the paradigmatic philosopher of negativity and constant object of Deleuzian criticism; third, finally, a proposal for an initial concept of negativity, derived from the analysis of what the author directly says regarding to the term. Such a concept must be based on the recognition of an ethical primacy of negation, comprehended as a vector for the practical orientation of an individual situated from the point of view of present time s actuality, as opposed to the ontological primacy of affirmation, manifest in the comprehension of difference as a transcendental form or foundation of experience.