The purpose of this study is to investigate whether the corporate governance principles, which are adopted by businesses to ensure their sustainability successfully, have an effect on business performance by discussing them in detail. This exploratory research article was carried out on participants in managerial positions in businesses operating in the Marmara Region. In addition, an attempt to collect data was made by delivering questionnaires to the management positions of the businesses in different regions to form a more valid sampling population from the whole of Turkey. The data which were provided by 304 questionnaires obtained as a result of various stages were analyzed by SPSS program. In the analysis performed, it was concluded that there is a relationship between the corporate governance principles consisting of the variables of transparency, fairness, accountability, social awareness, independence and discipline and business performance. Research results partially support studies in the literature. The research findings were interpreted, and the suggestions about managerial practices were presented in detail. This study will provide a basis for the scientific studies to be carried out in this field in the literature.