| Chang So-yun | |
| Nationality: | South Korean |
| Birth Date: | 11 November 1974 |
| Birth Place: | Busan, South Korea |
| Hometown: | Suwon |
| Weight: | 76kg (168lb) |
| Spike: | 312cm (123inches) |
| Block: | 301cm (119inches) |
| College: | Kyonggi University |
| Position: | Middle hitter |
| Currentclub: | Ex Hi-pass Zenith |
| Currentnumber: | 11 |
| Years: | 1992–1998 1998–2004 2009–2012 2013–2016 |
| Teams: | SK Hyundai Hillstate KGC Ex Hi-pass Zenith |
| Nationalyears: | 1992–2004 |
| Nationalteam: | South Korea |
| Hangul: | 장소연 |
| Hanja: | 張少燕 |
| Rr: | Jang Soyeon |
| Mr: | Chang Soyŏn |
Chang So-yun (; born November 11, 1974, in Busan, South Korea) is a volleyball player. Playing as a middle-blocker, she was one of the key players of the South Korean national team during the 1990s and the early 2000s (decade).
She participated at the 2001 FIVB World Grand Prix, and represented South Korea at the 1996 Summer Olympics and 2000 Summer Olympics.
In 2009, she was drafted at the age of 35 by KT&G Ariels as the 3rd rank of the first round from new player draft 2009.