This paper uses the new Decree on teacher education in Flanders, Belgium, as a case study to critically examine the changes in the conception of teacher professionalism in education policy. In this examination, the focus is on the 'form of problematisation' (Foucault) that is enacted in the texts of the Decree. The new conception of teacher professionalism will be identified at four levels in the new Decree on teacher education: (1) the definition of the teacher (and her training) as a strategic policy target, (2) the structural reform of teacher education, (3) the qualitative reform of teacher education, and (4) the organizational framing of institutes for teacher education.