Competent external auditors audit financial statements, which is important for any institution. Audit quality is a main concern in every audit. External auditors are obliged to express an opinion on the fairness of the audited financial statements. Ethical behavior is observed when an audit is conducted on a client, and the outcome affects the audit quality. The study aims to explore how auditors’ ethics affect audit quality. The participants in this study are 40 auditors who worked at local Certified Public Accountant (CPA) firms in Jakarta, Indonesia. Questionnaires were distributed, collected, and analyzed. For data analysis, this study used descriptive statistics, correlation, and simple linear regression. The findings revealed a moderately positive relationship (r = .040, p = 0.01) between the auditor’s ethics and audit quality. Moreover, regression results imply that auditor’s ethics significantly influenced the audit quality. According to the equation, audit quality = 21.065 + (0.394) (auditor’s ethics). The results imply that ethics is important in the audit process at local CPA firms. Thus, auditors are advised to observe the ethical way of auditing financial statements. For further research, there is a need to increase the number of samples and consider the ethical behavior of those auditors connected to the Big Four CPA firms. Additionally, other variables that may affect audit quality, such as key audit matters and block-chain technology, can be considered.