In the knowledge based economy, accounting information in general, and cost information in particular acquire increased importance. The quality of accounting information can be affected by the non-compliance with professional ethical requirements. In relation to the management accounting, the law provides a higher degree of freedom for the organization and presentation of the information, as compared to the financial accounting. Due to the importance of the information supplied, management accountants should observe certain professional ethical standards. Professional associations develop ethical guides with the purpose of supporting management accountants in solving the ethical problems they may encounter. Among other factors, universities play a significant role in the development of management accountants’ professional ethical conduct.