The present book is significant in several respects. First and foremost, thing is that it is one of the few studies analyses the customer buying behaviour at shopping malls and super markets at Tiruchirappalli city of Tamil Nadu, India. Further, this study used a very large samples containing all the supermarkets and shopping malls of Tiruchirappalli. The present study used the well-established Path analysis and Structural Equation Models (SEM) for analyses the customers buying behaviour at shopping malls and supermarkets. The result of the study also encouraging. The results of the present study show that buying decision of customers is influenced by their perception, expectations about service quality. Intention to stay of the customers is influenced by buying decision, satisfaction and service quality. Thus the shopping malls and supermarkets try to execute the positive changes in perception among the customers and increase the quality of their customers' services will help the customers' retention with same shopping malls and supermarkets.