Auditor personality is an interesting topic in accounting field because the research on the personality of an accountant is still rarely in Indonesia. This research was aimed to examine the moderating effect of Public Accounting Firm size, personality traits and locus of control on correlation between role conflict and auditor judgment bias. The sample of this research are auditors who work at public accounting firm in Java using regression analysis as the analysis method. The result showed that only role conflict which is moderated by locus of control internal that have significant effect on auditor judgment bias. This indicates that the auditor personality and the size of public accounting firm doesn’t affect their professionalism in making judgments.