The United Nations Peacebuilding Commission (PBC) will, according to Resolution 1645, “marshal resources at the disposal of the international community to advise and propose integrated strategies for post-conflict recovery, focusing attention on reconstruction, institution-building, and sustainable development in countries emerging from conflict”. The Commission is a subsidiary organ of the General Assembly and the Security Council and it has an advisory function towards all member states. 

The Commission has 31 member states: 7 members selected by the Security Council, 7 members elected by the ECOSOC, 7 members elected by the General Assembly, 5 top providers of assessed contributions to United Nations budgets and of voluntary contributions the United Nations funds, programmes and agencies and 5 top providers of military personnel and civilian police to United Nations missions. Seven of these member states will be selected according to geographical distribution and post-conflict experience. 

The Organizational Committee brings together the PCB members states to establish the work agenda for the Peacebuilding Commission. It is the primary decision-making body of the Commission, responsible for establishing its working methods and agenda.

PBC Country-Specific Configurations (CSCs) guide the Peacebuilding Commission's engagement with individual countries. Each configuration works closely with the national government. Apart from the PBC member states other relevant stakeholders are invited to participate in the CSCs meetings. 

The Peacebuilding Support Office assists the Peacebuilding Commission with advice and policy guidelines.   

The Peacebuilding Fund was set up in 2006 to support countries and programmes in peacebuilding activities.. It relies upon voluntary contributions from Member States, organizations and individuals. The UNDP Multi-Donor Trust Fund Office is the administrator.

The United Nations Peacebuilding Commission started working on 23rd June 2006.