This paper aims to investigate the extent to which board of directors’ mechanism is implemented in Libyan listed companies. This includes a consideration of composition, duties and responsibilities of the board directors. This study employed a questionnaire survey to collect required data from four key stakeholder groups: Boards of Directors (BD), Executive Managers (EM), Regulators and External Auditors (RE) and Other Stakeholders (OS). The results of this study provided evidence that Libyan listed companies generally comply with the Libyan Corporate Governance Code (LCGC) requirements regarding the board composition: the findings assert that most boards have between three and eleven members, the majority of whom are non-executives and at least two or one-third of whom (whichever is greater) are independent. Moreover, the results indicate that general assemblies in Libyan listed companies are practically committed to the LCGC’s requirements regarding the appointment of board members and their length of tenure. The findings provide evidence that boards in Libyan listed companies are carrying out their duties and responsibilities in accordance with internal regulations and laws, as well as the stipulations of the LCGC (2007). Furthermore, the stakeholder groups were broadly satisfied that board members are devoting sufficient time and effort to discharge these duties and responsibilities properly. This study helps to enrich our understanding and knowledge of the current practice of corporate boards as a significant mechanism of corporate governance (CG) by being the first to address the board of directors’ mechanism in Libyan listed companies.