The Brazilian Armed Forces (Portuguese: Forças Armadas Brasileiras, IPA: [ˈfoʁsɐz ɐʁˈmadɐz bɾaziˈlejɾɐs]) is the unified military organization comprising the Brazilian Army (including the Brazilian Army Aviation), the Brazilian Navy (including the Brazilian Marine Corps and Brazilian Naval Aviation) and the Brazilian Air Force (including the Aerospace Operations Command).

Brazil's armed forces are the second largest in the Americas, after the United States, and the largest in Latin America and the Southern Hemisphere by the level of military equipment, with 334,500 active-duty troops and officers. The armed forces are expanding their presence in the Amazon under the Northern Corridor (Calha Norte) program. In 1994 Brazilian troops joined United Nations (UN) peacekeeping forces in five countries. Brazilian soldiers were in Haiti from 2004 until 2017, leading the United Nations Stabilization Mission (MINUSTAH).

The Brazilian military, especially the army, has become more involved in civic-action programs, education, health care, and constructing roads, bridges, and railroads across the nation. Although the 1988 constitution preserves the external and internal roles of the armed forces, it places the military under presidential authority. Thus, the new charter changed the manner in which the military could exercise its moderating power.