Providing a service or product to other businesses or organizations is considered b2b marketing. In this case, b2b marketing tactics will be needed to attract customers. On the other hand, the banking industry is one of the most important and prominent industries in the world. Today, banks in developed countries act as a facilitator, professional consultant, and expert in increasing the financial resources of companies and collecting and exchanging necessary information for their customers. In modern banking, there are several components that affect the process of mobilizing the financial resources of banks and financial institutions. The aim of the present study is to examine the role of b2b marketing and organizational citizens hip behavior on the participation of private banks in Semnan province. According to the fin dings of the study, it can be said that b2b marketing and organizational citizenship behavior have a significant relationship with the participation of private banks.