Abstract: Nowadays, transparency of information plays a key role in increasing success of companies in line with their programs. Extensive disclosure can acquire investors’ trust on different aspects of performance or operations of company, resulting in reduction in level of information asymmetry or reduction in information costs of investors. The present research intends to examine relationship between financial ratios and level of transparency of the disclosed financial information in companies listed in Tehran Stock Exchange during 2008-2013. Correlation has been used as the research method. Analysis of the results has been made via the research model and used to describe variables of descriptive statistics including mean, median and variable. Results from hypotheses were specified using t-statistics at confidence level (95%) via software Eviews. Results indicated that there is a positive significant relationship between ratios of liquidity, profitability, activity and transparency of financial information yet there is not a significant relationship between debt ratio and transparency of information.