The Chief of Air Staff (abbreviated as COAS) () is the professional head and highest-ranking commissioned officer of the Bangladesh Air Force. The Chief of Air Staff is responsible for the overall command, administration, training, and operational readiness of the air force, and serves as the principal air adviser to the Government of Bangladesh on matters of air defence and aerospace security.
The office is held by an officer with the rank of Air Chief Marshal and is appointed by the President of Bangladesh on the advice of the Prime Minister of Bangladesh. The Chief of Air Staff is a senior member of the Armed Forces Division and plays a key role in safeguarding national airspace, supporting joint military operations, disaster response, and participation in international peacekeeping and humanitarian missions. Prior to 2016, from 2007 the appointment was held by an Air Marshal (three-star air officer) and from 1972 to 2007 COAS's rank was Air Vice Marshal.