Guiron le courtois—a vast chivalric novel written in prose and composed of the Roman de Meliadus and of the Roman de Guiron—was copied, redrafted, compiled in various manuscripts since its creation spanning from 1235-1240 to the end of the Middle Ages. Its material allows all kinds of continuations which makes it a work with blurred outlines. The manuscript BnF fr. 340 (End of 14th-Beginning 15th Century) associates the Roman de Meliadus and the Compilation of Rusticien de Pise; it forms a whole in which can be seen wandering knights, namely the fathers of the great Arthurian heroes driven by violent fights and a desire to shed blood abundantly, but also by merry encounters and word exchanges. This thesis ends at analysing this lively community through the exploration of both text and imagery in the manuscript BnF Fr 340; this iconographic analysis leads to the study of new programs of manuscripts dating back to the same period