Sun Caiyun (Chinese: 孙彩云; born July 21, 1973, in Shenzhen) is a Chinese former pole vaulter, who was one of the leading athletes in her discipline in the early 1990s. She became the first official world record holder, jumping 4.05 meters on May 21, 1992, in Nanjing, China. In 1994 she received a three-month doping ban.