This thesis proposes to articulate a theory of the poem in the works of Walter Benjamin stemming from his writings on poetry and language between 1914 and 1940, with a more significant starting point on a critique of two poems by Friedrich Holderlin and an epistolary discussion with Theodor W. Adorno regarding Charles Baudelaire. The main question raised in this thesis by the theory of the poem in Walter Benjamin was: in which way do poems relate to things, life and history? In this framework, the research points out the key concept of poetified (das Gedichtete) in Benjamin s writings and its importance not only for reflections about art but also for those about historical time, mainly from its transformation into the concepts of material content and truth content (Sachgehalt and Wahrheitsgehalt, respectively). In order to comprehend it, this work resulted in the creation of the concept of poetic uncounscious which allows for the relation, in Benjamin s thought, between the investigation of the details of a poetic phenomenon and the philosofical speculation of its idea. Finally, the research also tries to comprehend which are, before this theory of the poem, Benjamin s methods for a critique of the poem, namely stemming from the ideas that the poem is a monad, a minimal particle that presents an image of history, and that it does not reflect things or life, but expresses them. In that sense, even in its materialist phase, this research aims to show how benjamin s thought distinguishes itself from the structuration of traditional Marxism (as in Georg Lukács) wich considered the superstructure (and poetry, in extension) to be a reflex of the infrastructure (of the mode of production of life).