This paper presents an empirical investigation to study the relationship between audit quality and earnings management in Iranian banking industry. The proposed study gathers the necessary information from 18 different Iranian banks over the period 2005-2012. The study considers the effects of three independent variables including type of auditing, tenure of auditing and size of bank on earning managements. The result of our survey has indicated that there was a meaningful and reverse relationship between type of accounting and earnings management. In addition, the longer an auditing firm perform auditing program, the better the firm reports earnings management. Finally, as the size of firm increases, there is a better earnings management.