This study aims to verify the roles of sales employees, in B2B industrial business through their direct visits to customers. Also, it attempts to examine the effects of buyers recognitions on B2B service quality of suppliers and of the sales orientation of sales employees on the rapport-building, together with the role of the rapport to the relationship quality with customers and its mediating effect. This study was conducted in B2B MRO business setting with company A and the total number of usable respondents was 246. In this study, structure equation, path analysis and three-phase mediated regression analysis were completely done and the results show that the service quality of suppliers has no significant effect on establishment of rapports with customers. However, sales orientation of sales employees has significantly positive influence on it, and the rapports also play important roles in enhancing the relationship quality. The findings suggest that the relationship marketing should be actively implemented throughout education and training of sales employees and that the suppliers must provide better service quality than competitors to the customers to succeed in the market.