During the past few years, there has an increasing trend on using internet facilities to do different personal banking. People transfer money, pay their bills and even purchase shares of different companies using internet. There is also an increasing competition among banks and other financial institutions through providing new web based facilities. There is no doubt that a bank with no online banking can easily lose market share. The primary purpose of this paper is to investigate how a bank website can impact customer loyalty. The proposed study is implemented for one of governmental Iranian banks called Bank of Industry and Mine. The study distributes a questionnaire among 330 people who use the internet banking of this bank. We then analyze their feedback using structural equation system and all the hypothesis are confirmed.