Economie field, moral and political fields in Smith. This paper focuses on Smith's approach to economic grandeurs in The Wealth of Nations. This approach answers two questions : first, the question of the social nature of value, as value is the space in which the produce of labour acquire its social homo- geneousness ; the second question is that of the conditions through which the general cohesion of the economic system is obtained in space and time. The analysis of the labour market provides Smith with the necessary theoretical link between these two questions.Cet article est centré sur le traitement par Smith des grandeurs économiques dans La Richesse des Nations. Celui-ci répond à deux questions : celle de la nature sociale de la valeu...