The faunal assemblages of about 30 Middle Neolithic sites in northern France (from the Cerny, Chasséen, and Michelsberg cultures, as well as the Groupe de Noyen and the Groupe de Balloy, over the period from 4200 BC to 3800 BC), from both older and more recent investigations, have been analysed with the goal of relating patterns of deposition to their three principal archaeological contexts : enclosures, layers and pits. General trends include the very long-term reduction in cattle numbers, and the importance of pigs. The examination of species versus contexts showed that layers and enclosures followed the same patterns, while sites with pits were different. Thus enclosures and layers have a similar pattern of consumption of domestic animals : cattle then pigs, with sheep and goats in third place numerically. The remains from pit sites include fewer cattle and more pigs. Large game are found in all the enclosures, but not systematically in the other categories of site ; red deer are more numerous than boar and aurochs, with few roe deer found. The reasons for these divergences are not clear and future lines of research are considered.