The presence of Fichte's thought in the work of Deleuze is scarce, but nonetheless quiet suggestive, to the extent that in a recent paper Jean-Cristophe Goddard attempts a quest of an extreme affinity between both authors. In this paper I describe, firstly, the main appearances of Fichte in the work of Deleuze, and then I focus, trough the notes that the French philosopher attributes in general to “post-Kantianism”, on a reconstruction of a Deleuzian interpretation of Fichte's ontology, with its merits and flaws. On this basis, I explore the advantages offered by the perspective of affinity, but also the controversial consequences of such a deleuzianisation of the Fichtean legacy.