This article, based on a socio-cognitive approach, deals with the professional training of student teachers in French agricultural education during their practical work experience. The main objective is to demonstrate that the student teacher’s social interaction with his academic advisor allows him to use and develop his professional knowledge relating to practical matters. Based on a qualitative analysis this study presents the results of an investigation of seven students and six academic advisors. The article studies the interrelations between the nature (...) of the professional knowledges in question and the processes of construction in the work. (shrink)