In this study the effect of exchange reserves on the macroeconomic variables is probed and so as to achieve the goals here, we have used the data gathered during 1981-2013 and all the required information for this research has been received from Central bank Of Islamic Republic of Iran and World Bank. Results show that shocks of exchange reserves have had a positive and meaningful effect on exchange rate and inflation. They also show that the government has increased monetary base and inflation by injecting the liquidity from oil revenues.