Abstract : Paedophilia is a paraphilia characterised by behaviour, drives or sexual fantasies that are intense and recurring and that generally involve children. This sexual deviation is often linked to personal distress, to a significant alteration of personal, family, professional and social life, in a general sense. In our modern Western societies, paedophilia and the perversions associated with it are punishable by law. Paedophilia is a concept that is very ancient, complex and particularly diverse in its many clinical presentations. Its societal impact is very important and contrasts with the real knowledge of this issue among non-specialists, or even among specialists. In this second part of the article, the authors will develop the aetiologies of paedophilia, the therapeutic options and the forensic aspects.