Akrasia is a philosophical concept meaning the possibility to perform actions against one's best judgement. This contribution aims to clarify this phenomenon in terms of a social construction, stating it as a narrative configuration generated by an observer. The latter finds himself engaged in justifying a “problematic” line of action with regard to specific cultural beliefs referring to the self, the others and the behaviour. This paper intends to make explicit the assumptions underlying the traditional definitions of akrasia when, paradoxically, (...) an agent performs an action not in accordance with his/her best judgement. In the transition from modern to post-modern psychology, we here propose an interpretation of the phenomenon in psychological terms, envisaging akrasia as a narrative form functional to the identity processes and to the social dynamics of the structures of contemporary societies. Implications in the psychological practice will be taken into account. (shrink)