Yvon, Frédéric

This article presents a research made in French Rail Transport Company about professional culture. It uses the Bakhtinian concept of genre to analyze the dynamic between individual activity and professional culture in a cultural-historical perspective. At the beginning of the article, theoretical bases and concepts of the research are represented, then by means of extracts from the protocols is illustrated the idea of the development of professional culture under the effect of the individual activity as well as the development of individual activity under the effect of the professional culture.