Customer Satisfaction measurement is essential to determine service quality in Public Sector Banks in the era of intense competition.Customers are well informed by emergence of Information and communication technology. Customers have wide variety of choices to select public, private and foreign banks. The strategic way to retain the customer is to deliver high level of customer service ... [Show full abstract] satisfaction. The high level of customer perceived service quality results in satisfaction of the Customer. If the customer expectations towards banks or banks staff performance and perceived service quality are equal, the customer is satisfied or else dissatisfied customer. If the service performance exceeds customer expectations, the customer is satisfied or delighted. The current research area objective is the Comparative study of service quality of bank staff towards customers. The primary data and secondary data collected from differentsources. The sample of customers selected randomly from Indian Bank, Andhra Bank and State Bank of India. The research findings that bank staff need to be empathetic towards customers and behave politely with the customers.