Dissertation (MA Business Administration)The present study attempts to test the mechanisms of Export - Led Growth in Tanzania Mainland by taking a time- series data from 1980 to 2012. It applies Ordinary Least squares (OLS) method to investigate the relationship between Gross National Product, Total Exports, Agro-product Exports, Manufactured Exports, Mineral Exports, Petroleum Products, Other Exports and Investments. The results of the study support the Export - Led growth Hypothesis (ELGH) in Tanzania Mainland.