|Full name||Xu Jun|
|Born|| September 17, 1962
Suzhou, Jiangsu, China
|Peak rating||2668 (July 2000)|
Xu Jun (Chinese: 徐俊; pinyin: Xú Jùn; born September 17, 1962 in Suzhou, Jiangsu) is a Chinese chess Grandmaster. In 1994, he became China's fourth Grandmaster.
He was champion of China in 1983 and 1985. He has been a member of the Chinese Olympiad Team, a five times winner of the Asia Team Championship 1983-2003, the 1987 3.3 Zonal Champion, the 1998 Champion of China Open; the 2000-2001 Champion of Asia, and was a 2002 Chess Olympiad member of Chinese team which came 5th in the final standings.