This research aims to investigate the mutual effect of auditor industry expertise and board governance on the timeliness of financial reporting in a sample of listed companies. The current research is applied in terms of purpose, quantitative in terms of data type, inductive in terms of implementation logic, and descriptive-correlation in terms of implementation. Various sources have been used in this research, including books, domestic and foreign articles, and the Internet. The relationships between the variables have been tested using the correlation model and multiple regression with the dynamic panel approach. First, the collected data were classified in Excel software, and after organizing and calculating the variables, R statistical software was used to analyze the information. In order to investigate the hypotheses of the research, a statistical sample of accepted companies in selected industries from the Tehran Stock Exchange was considered using the accessible community method during the years 2001-2012. Based on the statistical analysis, the results at the five percent error level showed that there is a significant relationship between the governance of the board of directors and the timeliness of financial reporting. Industry expert auditors moderate the relationship between board governance and financial reporting timeliness.