This paper written by the Comité de nutrition de la Société française de pédiatrie is specially devoted to the nutritional treatment of infant and child acute diarrhea, i.e. oral rehydration with salts solution and feeding. It complements an article on drug therapy of child acute diarrhea written by the Groupe francophone d'hépatologie, gastroentérologie et nutrition pédiatriques, and published in this same issue of the Archives de pédiatrie.