| Sun Bigan | |
| Birth Date: | June 1941 |
| Birth Place: | China |
| Nationality: | Chinese |
| Office: | Chinese Ambassador to Iran |
| Term Start: | 1 April 1999 |
| Term End: | 1 June 2002 |
| Successor: | Liu Zhentang |
| Office2: | Chinese Ambassador to Iraq |
| Term Start2: | June 1994 |
| Term End2: | August 1998 |
| Office3: | Chinese Ambassador to Saudi Arabia |
| Term Start3: | September 1990 |
| Term End3: | April 1994 |
| Successor3: | Zheng Dayong |
Sun Bigan (Chinese: 孙必干; June 1941 – 12 January 2022) was a Chinese diplomat who served as the ambassador to several Middle Eastern countries and as China's Special Envoy on Middle East Issues.
He served as Chinese Ambassador to Saudi Arabia from 1990 to 1994,[1] Chinese Ambassador to Iraq from 1994 to 1998,[2] and Chinese Ambassador to Iran from 1999 to 2002.[3] Sun was also part of the team that re-established the Chinese embassy in Baghdad.[4]
From 2006 to 2009, Sun served as China's Special Envoy on Middle East Issues.[5] During his tenure, China heavily criticized Israel for its disproportionate use of force against Lebanon in 2006.
He died on 12 January 2022, at the age of 80.[6]