This study aims to examine the influence of financial constraints and capital cost of investors sentiment in the listed companies in Tehran stock exchange during 2009 to 2015. Totally, the given statistical method is based on correlation and multiple regression method in this research. The hypotheses were examined through the obtained results from econometric patterns and multi-variate regression. To investigate the significance of independent variable coefficient in each pattern, t-student statistics is used in 95% confidence level. Based on systematic elimination method, 107 firms were selected as the statistical sample of the research. The results showed that there is a significant relationship between capital cost and investors sentiments in the listed companies on Tehran stock exchange. There is also a significant relationship among measured financial constraints based on Zingales & Kaplan (KZ) index and investors sentiments in the listed companies on Tehran stock exchange. Between measured financial constraints based on White & Wu (WW) index and investors sentiments, there is no significant relationship in those firms.
