This article proposes the study of social mix evolution of through the public space. To that end, attention is focused on the “Frères Fisli” neighbourhood in Azzaba city as a case study. A social space, which, is considered as an adequate place, that promotes social mix and living together between Algerian inhabitants of different types of habitat that exist. The main objective of this article is to quantify the impact of public spaces to achieve the goal of social mix and its management, in order to promote living together. In order to carry out our survey, the study uses two survey tools: the mind map and the questionnaire. The choice of these two tools is not fortuitous. It has been studied in order to carefully check whether the constraints for the public space development are dependent on the evolution of inhabitants ‘social relations.   Received: 21 September 2021 / Accepted: 15 November 2021 / Published: 3 January 2022