This article has as subject the theoretical aspects about biography and autobiography, genres connected with the history and with factual contents, and their fusion with other literary genres as the roman, the tales or the essay and how this fusion has generated other modes like the biofiction and autofiction. This division between factual or imaginary contents and the impossibility to determine where it's the reality or the fiction in the biographical stories has produced a debate among several writers and critics that benefits nowadays the interest in the biographical literature. Many writers of biographical narrative think that Marcel Schwob, an author of XIX century, is one of more influencer writers in this literature for combining fiction and reality in his biographical compositions. By taking as main subject the works of this author, this article shows that many actual characteristics of biographical narrative have been exposed for this author.