The purpose of this study is to explore the relationship between board diversity and the earnings quality in the firms listed in Bursa Malaysia Main Market. Malaysia is a country with multi ethnicity and different cultures among the people and this might affect positively on the quality of earning. The study also examines the involvement of the Internal Audit function being performed in-house or outsourced as a tool to enhance the earnings quality for the firms. Nationality diversity and ethnicity diversity are found to have a significant impact on the earning quality of the sample companies. Meanwhile, gender diversity and Age diversity does not show any significant impact on earnings quality. This study offers a significant contribution to existing earning quality literature. The participation of more different races on the board will be able to increase the quality of earning of the companies.