The main objective of this research is to study the simultaneous effects of company-specific characteristics as well as macroeconomic variables on the capital structure of listed companies in Tehran stock exchange market for the periods of 2007 to 2014. For Consideration of Company-Specific Characteristics in this paper, we use the profitability ratios, the dividend payout, and stock price performance ratios. Moreover, variables such as GDP growth, exchange rate, inflation, interest rate and the ratio of banks credit as a percentage of GDP are given as macroeconomic variables. The research findings reflect that the profitability and dividend payout ratios impact capital structure throughout the industry. Moreover, GDP growth and bank credits (as percentage of GDP) influence the capital structure across the industry. Also, the results indicate that the effects of Company-Specific variables and macroeconomic variables on the capital structure vary across the industries.