According to the resource based view of the firm, intellectual capital is a strategic resource that contributes to competitive and superior financial performances. Present study is aimed to determining effects of three variables of Intellectual Capital includes: Human, Communication and Structural Capital on Market value On Book value of Asset (Q) of car – manufacturing Companies in Tehran Stock Exchange. In this research, it was measured Intellectual Capital using questionnaire of includes standard constructs and 95% reliability coefficient, and Q using Companies Financial Statements.The results have shown that, variables of Human, Communication and Structural Capital, have had 0.478, 0.445 and 0.403 positive effects on Q. Finally, it is concluded remarks including discussion, summary of implications for managers, and directions for further work.