Bourdieu conceptualises most aspects of social life in terms of fields, which constitute sites of struggle over a central stake. The resources which are used in these struggles, and whose appropriation is at stake, are defined as types of capital: economic, cultural, social and symbolic. Each field involves a set of players, of agents who are engaged in practices and strategies on the basis of an habitus. It is contended in this article that such an approach can be usefully mobilised to develop a sociological analysis of welfare. The model has to be slightly altered to make it more adequate for the study of the welfare field. First, what Bourdieu calls political capital is given a more prominent place. Secondly, the focus is more definitely set on the rates at which types of capital are converted in the welfare field. It is argued that such a model satisfies the central requirements of a sociology of welfare, in that it places welfare activities within the wider social context while grasping their internal dynamic. It provides an effective framework for addressing the main questions which are raised by a sociology of welfare.