The Superior Council of National Defence (Portuguese: Conselho Superior de Defesa Nacional, CSDN) is a body of the Portuguese Government specifically for consulting the President of Portugal on matters of national defence and the functioning and discipline of the Portuguese Armed Forces.
The CSDN is composed of a group of political and military leaders, among whom include:
The President of the Republic may, on his own initiative or at the request of the Prime Minister, invite other persons to participate, without the right to vote, in meetings of the Superior Council of National Defence. The Superior Council of National Defence meets ordinarily every three months and extraordinarily whenever convened by the President of the Republic, either on his own initiative or at the request of the Prime Minister.