This thesis, with its general content, considers night and darkness as determinative factors affecting the use of space and investigates the Historical Kemeraltı Bazaar, which is chosen as the thesis area, together with the user practices. For this research, the thesis examines night spaces, darkness and user practices in the context of social space. Firstly, the concept of night spaces and darkness were examined and the spatial aspect of the night was tried to be comprehended. Accordingly, darkness has a threatening and uncertain nature and it is associated with fear. That's why it is open to a number of transgressive and illegal acts. These are such as criminal acts, provocation, rape, political opposition, subcultural practices, urban abuse, posters and graffiti etc. Secondly, night spaces and darkness are controlled by the ruling powers or classes. Surveillance is used as a means of control in urban areas with a number of techniques and technologies. Finally, night as a time that supports social practices and creates a profitable space, appears as a place of consumption and leisure activities. In addition, the practices of the users in daily life (de Certeau, 1984) and the socially produced structure of the space (Lefebvre, 1991) were examined and correlated to the night spaces. In the light of these basic concerns, the night and darkness of the Historical Kemeraltı Bazaar, the practices and social spaces created by the actors who changed and reshaped it were examined. These actors are; vehicles, shops, customers-walkers, cleaning workers, waste material pickers, peddlers, security guards, street animals, graffiti and the atmosphere of bazaar itself. The relationships between the users and the space are reinforced with the concepts of Lefebvre's social space and de Certeau's tactic and strategy. In this direction, the nights and users of Kemeraltı Bazaar were evaluated and associated with the concept of night spaces. Keywords: Night, Darkness, Night Spaces, Social Space, Historical Kemeraltı Bazaar