In mordern business, customer – oriented philosophy is playing a key role. One of the factors that determine the business existence and development is the satisfaction of customers with the quality of the supply service product. This study aims to assess the impact of the factors on the customer satisfaction with Internet Banking service at Vietnam Joint Stock Commercial Bank for Industry and Trade – Gia Lai branch. Results of factor analysis and multivariate regression models of the total 260 customers show that there exist three components that affect satisfaction of customers including “responsiveness”, “empathy” and “reliability”. This study also proposes some recommendations to improve customer satisfaction and facilitate a sustainable development for businesses.