The results of this study indicate that IPO firms would conduct earnings management, regardless of the reputation of CPA firms. in other words; IPO firm provided lower-quality financial reports. Meanwhile, aforementioned phenomena are observed to be more serious in firms that were audited by more reputable CPA. We also find that firms audited by the CPA which tenure between 4 to 8 years are less likely to conduct earnings management. From the policy perspective, the results of this study support the ruling of the Financial Supervisory Commission imposing stronger accountabilities of CPA and establishing the mandatory rotation for auditor.