General Xu Yongchang (15 December 1885 – 12 July 1959) (Hsu Yung-chang; Chinese: 徐永昌; pinyin: Xú Yǒngchāng; Wade–Giles: Hsu2 Yung3-ch'ang1; style name: Cichen (Tzu-chen)) was the Minister of Board of Military Operations of the Republic of China between December 22, 1948, and April 22, 1949, and the representative of the Republic of China on September 2, 1945, at the signing of the Instrument of Surrender of Japan that ended World War II.

He was the Chairman of Shanxi province at the time of Mukden Incident, and served in the National Revolutionary Army as the Chief Operations Supreme Staff.

After the Second Sino-Japanese War, he was the president of the Beijing Military Institute and the Minister of Defence.

He went to Taiwan after the Chinese Civil War, served as a senior advisor to the Office of the President and a member of Central Review Committee, and died in 1959.

Xu Yongchang's diary was published by the Academia Sinica's Institute of Modern History in 1989.