Foreign banks have 150 years of history in Turkey. Because of the increase on the government debts at the second half of the 19th Century, in terms of those debts and the economic structure of the country, foreign banks had acted according to their own interests and multiplied rapidly. It is seen that such activities of foreign banks had continued for a while after the establishment of the Republic. But, establishment of the banks have changed the situation. However, there had been in an increase on the number of foreign banks at the second half of the 20th century on the framework of the liberal economic policies and there’s been a definite increase on the number of foreign banks after the 1980s global ventures in Turkey. Again, the number of foreign banks and their activities in economy has showed an increase with the privatizationpolicies of the state after the year 2000.The benefits and the costs of those banks to the country have to be investigated thoroughly.