The principal organs of D-8 are:
1. The Summit
2. The Council
3. The Commission
The Summit, which is the supreme organ of D-8, is composed of the Heads of State/Government of member states. It is convened once every two years.
The Council is composed of the Ministers of Foreign Affairs of member states. It is the political decision-making organ of D-8, and acts as a forum for thorough and comprehensive consideration of the issues at hand.
The Commission is the executive body of D-8. It is composed of senior officials appointed by their respective governments. Each Commissioner is responsible for the national coordination in his/her respective country.
According to the decision made by the Heads of State/Government at the 8th Summit (Islamabad, Pakistan, 2012), the composition of the Directing Staffs of the Secretariat until December 2016 is as follows:
1. Secretary General (Iran)
2. Director I (Administrative, Legal and Internal Issues)(Nigeria)
3. Director II (Economy,Implementation and External Relations)(Bangladesh)