| Gu Wengen | |
| Native Name: | 顾文根 |
| Native Name Lang: | zh-cn |
| Office: | Deputy Commander of the PLA Navy |
| Term Start: | January 2008 |
| Term End: | December 2009 |
| 1Blankname: | Commander |
| 1Namedata: | Wu Shengli |
| Successor: | Xu Hongmeng |
| Office1: | Commander of the South Sea Fleet |
| Term Start1: | July 2004 |
| Term End1: | January 2008 |
| Predecessor1: | Wu Shengli |
| Successor1: | Su Shiliang |
| Birth Place: | Nanhui, Shanghai, China |
| Party: | Chinese Communist Party |
| Serviceyears: | 1965−2009 |
| Rank: | Vice-Admiral |
Gu Wengen (; born November 1946) is a retired vice-admiral (zhong jiang) of the People's Liberation Army Navy (PLAN) of China. He served as Deputy Commander of the PLAN and Commander of the South Sea Fleet.
Gu Wengen was born in November 1946 in Nanhui, Shanghai, and enlisted in the PLAN in 1965.[1]
Gu spent most of his career in the PLAN's East Sea Fleet, rising to deputy chief of staff, and then deputy commander in 1996. He also attained the rank of rear admiral the same year. In July 2004, he was promoted to commander of the South Sea Fleet and concurrently deputy commander of the Guangzhou Military Region,[1] succeeding Wu Shengli.[2] He was promoted to vice-admiral in July 2005, and appointed deputy commander of the PLA Navy in January 2008.[1]