The present study was conducted to investigate the relationship between financial reporting transparency, audit quality and stock price crash risk in Islamic environments. The statistical population of this study is all companies listed on the Tehran Stock Exchange during the years 2011 to 2021. The multivariate regression method was used to test the research hypotheses. The research method is inductive-deductive in which theoretical foundations and research background were collected through the library, articles and the Internet, and the research hypotheses were rejected or proven by using appropriate statistical methods to generalize the results. Financial data was collected in Excel software to form a database and then analyzed using IViews software to test the research hypotheses. The research results showed that there is a significant and positive relationship between financial reporting transparency and crash risk. Lack of transparency of financial information increases the possibility of a sudden influx of bad news into the market and, as a result, the risk of stock price crash. Also, lack of transparency in financial reporting has a significant and inverse relationship with audit quality.