The purpose of this research is to find and test influence between structure assets, the ratio debt, profitability, liquidity, sales growth, and the size of the company to structure capital companiesblue chips listed on the Indonesia stock exchange (IDX) a period of the year 2011-2014. This researchuses the method purposive sampling. Technique the analysis used is linear regression multiple. Test ahypothesis that used is test f statistics and test t statistics, with a level α = 5 percent. This researchresult indicates that simultaneously structure assets, the ratio debt, profitability, liquidity, salesgrowth, and the size of the company is the a significant impact on capital structure. In partialstructure assets, the ratio debt, and liquidity is the a significant impact on capital structure. Whileprofitability, sales growth and the size of the company in partial there is no the effect on capitalstructure. Value adjusted r square of 0,298. This means that 29,8 % dependent variable the capitalstructure can be explained by six independent variable while the rest of 70,1 % capital structuredescribed by variable or other causes out model.