<p class="Style1"><em>Internal auditing serves help management in detection and prevention his that happens at an organization in the implementation of the good corporate governance. </em><em>Principies of good corporate governance is an indicator the achievement of the </em><em>balance interests, so the clash interests that occurs could focus and controlled and not result in losses to each party. According to previous studies, fraud led to the collapse of </em><em>the world class companies. This is because inactive of mechanism good corporate </em><em>governance. The </em><em><sup>-</sup></em><em>role of the auditors internal in an effort to detection and prevention </em><em>his has a strong enough. And the role of the auditors internal also has a very important </em><em>in good corporate governance. Methods used in this research is research methodology </em><em>explanatory research with quantitative survei aims to understand the influence of the </em><em>role of the auditors internal (components expertise, the scope of the work, the </em><em>approach) that was undertaken auditor internal in order to detection and prevention </em><em>his with the implementation of the good corporate governance on a 50 respondents is </em><em>the company open a listing on the Bursa Efek Indonesia through the distribution of the questionnaire. The result has been concluded, the expertise, the scope of the work, the </em><em>approach that was undertaken internal audit influential indirectly on the ,corporate governance through the intervening the detect and prevent offraud. For the company </em><em>public, should be channeled to detect cheating through prevention, prevent is the root </em><em>cause problems cheating that the creation of principles of good corporate go</em><em>v</em><em>ernance </em><em>in the company.</em></p>