The main objective of my thesis is the analysis of the peculiarities of the autobiographical genre, which has a commitment to the configuration of an identity project. Despite the apparent commitment with the truth, which is proper of the historiographic genre, the act of recollection shifts the Mimetic narrative of the field of reproduction to the field of creation, without transgressing reality, act performed by the fictional narrative. The author doesn t defend categorical boundaries between these genres, on the contrary, defends the possibility of a constant dialogue among them, even though, these dialogues do not delete the existing border between the different speeches. The subtle difference between genres resides on the ability of the author to keep your commitment during the act of creation, his ability to maintain the hierarchy of intentions during his writing. To identify such a difference, it is up to the reader to be able to engender in his analysis a connection between his repertoire- social conventions that orients his reading – and the text repertoire, which means the hierarchy of intentions that is present during the production of the speech.