This paper examines the relationship between the International Financial Reporting Standards (IFRS) adoption and the auditor changes. Based on Taiwan listed firms during 2009 to 2015, I investigate the effect of the IFRS adoption on the likelihood and direction of auditor changes. The empirical results show that the likelihood of auditor changes from big audit firms to small audit firms is negatively associated with IFRS adoption, implying that big audit firms have expertise on IFRS. Furthermore, I find that the likelihood of auditor changes from small audit firms to other small audit firms increase in the year of IFRS adoption. The sensitivity analysis results show that the likelihood of audit switches from big audit firms to small audit firms increases in the year before the year of IFRS adoption.