The necessity of capital to maintain investment and also use of new potentials and opportunities in order to sustain growth and economic development is clear. Iran needs development's strategy and this development requires continuous investment. As we know Iran encounter with countless economic and political sanction and these sanctions were effective on absorbing foreign investment's volume during recent years. We try to study whether negligible foreign investment is effective on GRP Growth? The casual relationship between GRP Growth and foreign investment growth were studied by use of Hsiao casual test in the years of 2000-2010. Findings showed there was perceivable mutual relationship between GRP Growth and foreign investment.
