This study aims to examine and analyze the effect of auditor judgment and professional skepticism on the quality of internal audit at the Inspectorates of Central Sulawesi Province and Palu City. This type of research is survey research. Data was collected by distributing questionnaires to 54 auditors working in the Inspectorate of Central Sulawesi Province and Palu City. The analytical tool used is multiple linear regression analysis with the help of SPSS version 16.0 program. The results showed that the auditor's judgment had a positive and significant effect on the quality of internal audit, while professional skepticism had a positive and significant effect on the quality of internal audit. Auditor judgment and professional skepticism simultaneously affect the quality of internal audit.