Inthasom should not be confused with Inthaphom.
| Chao Inthasom Lao: ເຈົ້າອິນທະໂສມ | |
| King of Luang Phrabang | |
| Succession: | King of Luang Phrabang |
| Reign: | 1723 – 1749 |
| Predecessor: | Ong Kham |
| Successor: | Inthaphom |
| Succession2: | Ouparach of Luang Phrabang |
| Reign2: | 1713 – 1723 |
| Regent2: | Ong Kham |
| Reg-Type2: | King |
| Spouse: | Taen Sao Taen Kham Thep Boupha |
| Issue: | Prince Mang Sotikakumman Prince Ong Ek Anurutha Prince Nark Prince Chetthawong Inthaphom Surinyavong II Prince Soravong Princess Keo Rattana-Phimpha Princess Sikamkong Princess Susada Princess Soutamma Princess Maad Lath Princess Nang Wen Keu-Sam Phiu |
| Father: | Prince Raxabut (Indra Brahma) |
| Mother: | Princess Chandra Kumari |
| Birth Date: | ? |
| Death Date: | 1749 |
| Death Place: | Luang Phrabang |
Chao Inthasom (Lao: ເຈົ້າອິນທະໂສມ; died 1749) was the king of Luang Phrabang from 1723 to 1749.[1]
Inthasom was a younger brother of Kingkitsarat. Upon his brother's death in 1713, he marched to Luang Phrabang aiming to challenge the throne, but his cousin Ong Kham crowned the new king and granted him the title oupahat (viceroy).[1]
After ten years of joint rule, Inthasom successfully usurped in the king's absence. He dispatched tribute missions to China in 1723, 1734 and 1753. He ruled peacefully until his death in 1749.[1]