Fazlul Quader Chowdhury (1919–1973) was a Bengali politician who served as the 5th speaker of the National Assembly of Pakistan from East Pakistan. He belonged to Ayub Khan's Convention Muslim League. He was also the Acting President of Pakistan from time to time when Ayub Khan left the country. His elder brother Fazlul Kabir Chowdhury was the leader of the opposition in East Pakistan assembly. Quader was preceded by Maulvi Tamizuddin Khan of Awami League.