Ehsan Shamsi - Department of Accounting, Malayer Branch, Islamic Azad University, Malayer, Iran
Hamidreza Habibi - Department of Accounting, Malayer Branch, Islamic Azad University, Malayer, Iran

The main purpose of this research is studying the effect of change in auditor’s opinion on timely disclosure of financial information. The statistical population of the current research is all firms listed in Tehran Stock Exchange during 2010 to 2012. The sample size is 101 firms after screening. Findings, using multiple regressions, show that change in auditor’s opinion contributes to firms’ increased timely disclosure of financial information.

Change in auditor’s opinion, timely disclosure, disclosure quality