Bank financial institution is designed to facilitate financial transactions for customers and keeping money and run. It is the appropriate place for keeping money and funds, and where they can borrow it when the need for ensuring that covers the loan value or a person who pledged to ensure the guarantor or re-cover the loan when the debtor was delayed payment, the bank managed the money-changer (or the bank manager) and a group of staff .

Secretary Bank is the place to save the surplus money and usually pays annual interest on the bank out of money saver in the absence of moving money saver for a period agreed upon can be a useful vehicle.

Banks typically lend to people the amounts they need them for the benefit of the bank, this method is prohibited in Islam, and replaced by the Islamic banks need to bridge the client borrower through the purchase of bank customer need it, such as real estate borrower or mode of transportation in cash and sold to the customer credit borrower at a higher price with the After paying the loan in one go at a later date agreed upon or determined the amount of installment payments.

Banks are many other banking business such as discount bonds and receipts receivable (Exchange) for the commission of certain agreed upon, and other business transformation and disposal of its currency to another.

Established banks during the recent European renaissance in the city of Venice in Italy. The foundations of Talaat Harb Bank of Egypt in the early twentieth century. This bank is very important in Egyptian history in the history of Arab Banks.

Banks is very important role in the economy. The primary mission is lending money to individuals, companies or governments. Some banks lent money to individuals only lent money to banks and other companies only, but there are also some banks that lent money to both candidates. After that, however, quoting the loan and that is sometimes reported profit 6 percent.

Second task for the banks is that it preserves the place where individuals and companies money. Pay the bank a profit to customers at all times 3 percent for example. And the bank that lends money to Achkad or loan companies.

Some cities are centres of the financial industry, such as New York in America and London in Britain and Japan in Tokyo and Frankfurt in Germany and Bahrain Financial port in Bahrain. In these cities located thousands of banks and lending billions of dollars each year