| Chirapravati Voradej จิรประวัติวรเดช | |
|---|---|
| Prince of Nakhon Chaisi | |
 HRH Prince of Nakhon Chaisi | |
| Minister of Defence | |
| In office | 11 December 1910 - 4 February 1913 |
| Appointed | King Vajiravudh |
| Predecessor | Bhanurangsi Savangwongse |
| Successor | Arun Chatrakul |
| Chief of the Joint Operations Department | |
| In office | 8 August 1901 - 11 December 1910 |
| Appointed | King Chulalongkorn |
| Predecessor | Narisara Nuwattiwong |
| Successor | title merged |
| Born | 11 July 1876 Bangkok, Siam |
| Died | 2 April 1913 (aged 36) Bangkok, Siam |
| Spouse |
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| Issue | 5 Children See list
|
| House | Chirapravati family (Chakri Dynasty) |
| Father | Chulalongkorn (Rama V) |
| Mother | Thapthim Rochanatisha |
| Signature |  |
| Military career | |
| Service |  Royal Siamese Army |
| Rank | .svg){kind=small} Field Marshal |
Field Marshal Prince Chirapravati Voradej, Prince of Nakhon Chaisi (Thai: พระเจ้าบรมวงศ์เธอ พระองค์เจ้าจิรประวัติวรเดช กรมหลวงนครไชยศรีสุรเดช) was a prince of the Chakri Dynasty and influential military officer of Siam. The prince was a son of King Chulalongkorn (Rama V) and Chao Chom Manda Thapthim Rochanatisha. He was the king's 17th child.
The prince was part of the first group of the king's sons sent to Europe to study, spending time there from 1885 - 1896. After his return to Siam, he served as the Commander of the Department of Military Operation (Commander of the Army) and Minister of Defence under his father and his brother, King Vajiravudh (Rama VI). Because of his important and modernising reforms of the Royal Siamese Army, he is now considered the 'Father of the Thai Army'. His descendants uses the surname Chirapravati (จิรประวัติ ณ อยุธยา).