| Duke Xiao of Chen 陳孝公 | |
| Succession: | 4th ruler of Chen |
| Reign: | 10th century BC |
| Predecessor: | Duke Xiang of Chen (uncle) |
| Successor: | Duke Shèn of Chen (son) |
| Full Name: | Gui Tu (媯突) |
| Father: | Duke Shēn of Chen (陳申公) |
| Issue: | Duke Shèn of Chen (陳慎公) |
| House: | Gui |
| Dynasty: | Chen |
| Posthumous Name: | Duke Xiao (孝公) |
Duke Xiao of Chen (; reigned 10th century BC), personal name Gui Tu, was the fourth ruler of the Chen state. He was the grandson of the state's founder Duke Hu of Chen, who married the eldest daughter of King Wu of Zhou.
Duke Xiao was the son of Duke Shēn of Chen (陳申公), the second ruler of Chen. When Duke Shēn died, the throne passed to his younger brother Gaoyang, Duke Xiang of Chen, instead of his son Tu. However, Duke Xiao ascended the throne after the death of his uncle Duke Xiang. Duke Xiao was succeeded by his son Yurong, known as Duke Shèn of Chen (陳慎公).
. Xi Zhou Shi . zh:西周史 . History of the Western Zhou . Chinese . Yang Kuan . 2003 . Shanghai People's Publishing House . 978-7-208-04538-5.