The paper analyses some relevant features of the legal regulation of employment for Catholic religion's teachers in public school. In particular, it focuses on those regulatory profiles, highlighting difficulties of ensuring a balance between different interests as the access to job, the teaching authorization issued by the Bishop and mobility. In the final part, the regulation of employment relationship for the Irc is placed in relation to the current function of teaching religion in order to emphasize critical aspects characterizing the current model as well as the need to overcome it.