[The latest systematic revision of the benthic Amphipoda Gammaridea accounts for 494 species along the French coast. The presence of these species is given for 11 continental shelf areas and the Atlantic and Mediterranean bathyal depths. The richest areas are the western part of the English Channel, the southern part of the Bay of Biscay and the Provence and Cote d'Azur coasts. The poorest areas are the eastern English Channel, due to an impoverishment of the fauna in this part of the Channel, and other areas where knowledge appears insufficient, e.g., the Mer d'Iroise, the Atlantic continental shelf from southern Brittany to the Gironde, the Golfe du Lion, and the Corsica coasts. The similarities between the 13 areas show that the amphipod fauna forms four distinct faunistic groups: English Channel plus Mer d'Iroise, Atlantic continental shelf, Mediterranean continental shelf, and the bathyal zone. A comparison between the French Gammaridea fauna with those of the biogeographically neighbouring ones shows that the French fauna appears to be an interesting biogeographical cross between the boreal and cold temperate fauna and the temperate and warm temperate fauna. The results indicate a biogeographical boundary at the western English Channel. Species richness is greater at this boundary than it is in adjacent areas. La mise a jour de la liste des especes d'Amphipodes Gammaridea benthiques presents le long des cotes de France metropolitaines permet de denombrer 494 especes. Ce recensement tient compte des dernieres revisions systematiques et des prospections a l'echelle des zones cotieres et bathyales du pourtour metropolitain. Les inventaires dans 11 regions du plateau continental et dans les deux zones bathyales atlantique et mediterraneenne permettent de mettre en evidence les zones de plus forte richesse en especes (Manche occidentale), sud Gascogne et Cote de Provence-Cote d'Azur, celle de plus faible richesse en especes (Manche orientale) et celles pour lesquelles le potentiel de connaissance est manifestement insuffisant: Mer d'Iroise, region des Pertuis Atlantiques, Languedoc-Roussillon et Corse. Les affinites entre les differentes zones montrent qu'il existe quatre grands ensembles faunistiques: Manche et Mer d'Iroise, Atlantique, Mediterranee et zone bathyale. Une comparaison avec les faunes voisines montre que la faune des cotes francaises correspond a un carrefour biogeographique entre la faune boreale au nord et la faune sub-tropicale au sud et que plusieurs contingents d'especes peuvent etre identifies., The latest systematic revision of the benthic Amphipoda Gammaridea accounts for 494 species along the French coast. The presence of these species is given for 11 continental shelf areas and the Atlantic and Mediterranean bathyal depths. The richest areas are the western part of the English Channel, the southern part of the Bay of Biscay and the Provence and Cote d'Azur coasts. The poorest areas are the eastern English Channel, due to an impoverishment of the fauna in this part of the Channel, and other areas where knowledge appears insufficient, e.g., the Mer d'Iroise, the Atlantic continental shelf from southern Brittany to the Gironde, the Golfe du Lion, and the Corsica coasts. The similarities between the 13 areas show that the amphipod fauna forms four distinct faunistic groups: English Channel plus Mer d'Iroise, Atlantic continental shelf, Mediterranean continental shelf, and the bathyal zone. A comparison between the French Gammaridea fauna with those of the biogeographically neighbouring ones shows that the French fauna appears to be an interesting biogeographical cross between the boreal and cold temperate fauna and the temperate and warm temperate fauna. The results indicate a biogeographical boundary at the western English Channel. Species richness is greater at this boundary than it is in adjacent areas. La mise a jour de la liste des especes d'Amphipodes Gammaridea benthiques presents le long des cotes de France metropolitaines permet de denombrer 494 especes. Ce recensement tient compte des dernieres revisions systematiques et des prospections a l'echelle des zones cotieres et bathyales du pourtour metropolitain. Les inventaires dans 11 regions du plateau continental et dans les deux zones bathyales atlantique et mediterraneenne permettent de mettre en evidence les zones de plus forte richesse en especes (Manche occidentale), sud Gascogne et Cote de Provence-Cote d'Azur, celle de plus faible richesse en especes (Manche orientale) et celles pour lesquelles le potentiel de connaissance est manifestement insuffisant: Mer d'Iroise, region des Pertuis Atlantiques, Languedoc-Roussillon et Corse. Les affinites entre les differentes zones montrent qu'il existe quatre grands ensembles faunistiques: Manche et Mer d'Iroise, Atlantique, Mediterranee et zone bathyale. Une comparaison avec les faunes voisines montre que la faune des cotes francaises correspond a un carrefour biogeographique entre la faune boreale au nord et la faune sub-tropicale au sud et que plusieurs contingents d'especes peuvent etre identifies.]