| Khai Bua Ban | |
| King of Lan Xang | |
| Reign: | 1433–1436 |
| Coronation: | 1433 |
| Predecessor: | Lusai |
| Successor: | Kham Keut |
| Dynasty: | Khun Lo |
| Religion: | Therevada Buddhism |
| Birth Place: | Muang Sua, Lan Xang |
| Death Date: | 1436 |
| Death Place: | Sop Kham, Lan Xang |
| Regnal Name: | Samdach Brhat-Anya Chao Kaya Buvanabana |
Khai Bua Ban was a king of Lan Xang, ruling from 1433 until 1436. At the time of his succession, he was governor of Chiengkai. Khai Bua Ban's reign ended after Nang Keo Phimpha ordered his death.