Based on the models which are presented in order to define the human needs, social interactions is one of the necessary issues. Disregarding the notions, beliefs, preferences and other aspect of different personalities which are thought to be the most important human behavior controllers in behavioral science theories, physical environment also has a potential impact related to the human behavior. In according to this, public spaces in residential areas, as the places that provide residents with the possibility of gathering together, could establish the social interactions among them. Ignoring this need of residents and also the environment’s capability for supporting this issue, may change physical environment into useless and empty spaces. This could cause dissatisfaction of the environment among inhabitants and consequently, would result to their absence in public spaces. The present study, investigated this issue in two residential complexes by using field survey, interviews, and questionnaire. Finally the data were analyzed by correlation coefficient and then the result presented.