Banking industry, which is closely associated with the invention and spread of the money, influences on economic growth and development. The main role of the banking system is to create a saving of deposits and using it in beneficial investments or lending it to different people with various investment purposes. Accordingly, banks play essential role as financial intermediaries and provide necessary funds from investors to borrowers and users. In this regard, appropriate management of cash flows is essential for banks. Cash management is a trade-off between risk and return like what happens in other kinds of managements meaning that improving cash management increases the cash considering the limited amount of resources and eventually increases the share of the financial institution. In this paper, the impact of cash management in Iranian banks on their value of stock in 2011 was examined based on the econometrics model and least-square technique. The results indicate a significant and positive impact of the increase in the cash management index on the banks’ stock value, meaning that a one percent increase in this index will increase 1.1 percent of the banks’ stock value.