Military Police are the uniformed preventive state police of the states and of the Federal District of Brazil. The Military Police units are the main ostensive police force at the state level and are responsible for policing and maintaining the public order. Their formations, rules and uniforms vary depending on the state. Investigative work and forensics are undertaken by the Civil Police of each state.

Military police (MP) are law enforcement agencies connected with, or part of, the military of a state. In wartime operations, the military police may support the main fighting force with force protection, convoy security, screening, rear reconnaissance, logistic traffic management, counterinsurgency, and detainee handling.