This paper evaluates the impacts of earnings quality criteria on the ratio of price to earnings per share (P/E) on 88 accepted companies in Tehran Stock Exchange (TSE) over the period 2007- 2012. The results indicate that there was a positive and significant relationship between the P/E ratio and cash dividend. There is also a positive and significant relationship between P/E ratio as dependent variable and the gross profit ratio to sales. On the other hand, there is a significant reverse relationship between P/E ratio and the profit variability. However, no significant relationship exists between P/E as dependent variable and deferrals (accruals) variable.