Abstract: This study aimed to investigate the effect of the brand on customer loyalty in the banking industry of Iran in 2015 was carried out. The research method in term of purpose was descriptive and in term of the data collection surveys in term of reason specifically show structural equations model. The population of this study consisted of bank customers who were mostly educated individuals. The sample size consisted of 427 patients randomly sampling and formulas of a sample size were used for unlimited community of the capital was selected in the seventh largest bank. The studied indicators were tested through a questionnaire consisting of 36 standard questions with Likert the package which in terms of reliability and validity were in the acceptable level. After analyzing the data, it became clear that brand has a positive impact on customer loyalty. Among factors shaping the brand, brand reliability index had the greatest impact on customer loyalty. Among the studied independent variables, customer satisfaction has the greatest impact on to customer loyalty in the bank. First, assuming normal distribution of data at the level of 95% was approved. Then in order to check the status of variables and determine the level and intensity of its relationship to the one-sample t test, Pearson correlation coefficient was used. To comparison and ranking the impact of the independent variables Friedman test was used. Using structural equation modeling and software Lisrel, measurement accuracy of the models examined, which represents the appropriate version of the model parameters.