The transformation and change of social knowledge in Modern Turkish Republic has begun with the fall of the Ottoman Empire. Whilst the transformation of knowledge took place in daily knowledge, the change that took place in the political structures had a broad influence in the language, religion and tradition. The appearance of a new form of daily knowledge created a new common sense and this has opened the road towards the possibility of investigating social representations of various phenomena. Among these the social representations of madness in daily knowledge have already existed in common sense knowledge for a long time. With this in mind, the main goal of this paper is to explore contemporary urban Turkish social representations of madness. This study has shown that both scientific and common sense knowledge exist at present in citizens' daily knowledge and practices.