SUMMARY
Today, organizations’ emphasis is on preserving customers through promoting relationship quality with them as a competitive advantage. Psychological capital of organization’s staff is the other one of competitive advantages and organizational capital which can assist in promoting relationshipquality with customers as the main organizational capital. This research aims to evaluate the effect of psychological capital on relationship quality with customers and its components which have been studied at the field of corporate banking of EghtesadNovin Bank. Accordingly, standard and common questionnaires were used in order to collect statistical data. The questionnaires were distributed among qualified experts of relationship with customers of corporate banking. Confirmative factorial analysis at two states including standard estimation and significance coefficients are used to test validity and reliability of questions whose results indicate relative appropriateness of indexes. Multi-variant analysis has been used for hypotheses confirmation or rejection. Axis’s variance and its special software means LISREL have been applied in this research for implementing and formulating structural equation model. Research’s results indicate significant effect of experts’ psychological capital on relationship quality with customers and its components such as customer’s satisfaction, commitment and trust. Therefore, we can argue that promotion of staff’s psychological capital quality has a positive effect on promoting relationship qualitywith customers.