This volume contains the first critical edition of the Summa Alexandrinorum, that is the medieval Latin translation made in 1243 by Hermann the German of an Arabic abridgment of the Nicomachean Ethics known as the Ihtisar al-Iskandaraniyin. It is accompanied by a French translation. The volume also contains a full study of the manuscript tradition of the Latin text and sets out the principles used in the edition, which takes account, where necessary, of the Arabic version of the text, which has survived in the form of fragments. A study of the origin of the Summa Alexandrinorum and the relations between the Summa and the fragments and testimonies which are extant in other traditions and different languages completes the volume. Ce volume propose la toute premiere edition critique, accompagnee d'une traduction francaise, de la Summa Alexandrinorum, traduction latine medievale executee en 1243 par Hermann l'Allemand d'un abrege arabe de l'Ethique a Nicomaque connu sous le titre d'Ihtisar al-Iskandaraniyin. Il presente egalement une etude complete de la tradition manuscrite du texte latin, et les principes d'edition adoptes dans l'edition, qui prennent en compte, ponctuellement, la version arabe du texte qui a ete conservee sous la forme de fragments. L'etude de l'origine de la Summa Alexandrinorum et des relations entre la Summa et les fragments et temoignages conserves dans d'autres langues et appartenant a autant de traditions paralleles et diverses vient completer ce volume.