The aim of this paper presentation is to present a tentative analysis of what is constructed as “teacher knowledge” of a RE teacher through supervision conferences in Swedish teacher education. The analysis will discuss different categories related to knowledge, skills and dispositions, needed for a RE teacher to teach in upper secondary school. A theoretical assumption is made that joint talk will construct meaning and, in the present case of studying a teacher education practice, that joint talk (and the analysis of joint talk) will construct scientific knowledge about “RE teacher knowledge”. The analysis is based upon an empirical material generated from observations and transcriptions of six supervisory conferences in Swedish RE teacher education held atsix different schools in five different cities, organized by three different universities in Sweden. Each supervisory conference is a tripartite dialogue, involving a RE student teacher, a RE teacher educator from university and a RE teacher from school. In the methodological design of the study, interviews with all three participants are included, both before and after the supervision conference. An observation of a RE lesson held by the student teacher before all supervision conferences respectively, arealso included. In the presentation a comparison will be included between RE teacher knowledge which is constructed by the triad in the conference talk and knowledge categories in focus when the participants are interviewed individually. To sum up, the presentation will concern a tentative analysis of RE teacher knowledge through the construction of categories based upon observations of a teacher education supervision practice and interviews with the participants.