Najaf-Qoli Khan Bakhtiari
| Saad al-Dowleh سعدالدوله | |
|---|---|
| 7th Prime Minister of Iran | |
| In office 1911 – 17 January 1913 | |
| Monarch | Ahmad Shah Qajar | 
| Preceded by | Sepahsalar-e Tonekaboni | 
| Succeeded by | Mohammad Ali Ala al-Saltaneh | 
| In office 1 May 1918 – 8 August 1918 | |
| Monarch | Ahmad Shah Qajar | 
| Preceded by | Mostowfi ol-Mamalek | 
| Succeeded by | Vosugh od-Dowleh | 
| Personal details | |
| Born | 1846 Chaharmahal province, Sublime State of Iran | 
| Died | 1930 (aged 83–84) Isfahan, Imperial State of Iran | 
Najaf-Qoli Khan Bakhtiari (1846–1930; Persian: نجفقلیخان بختیاری) also known as Saad al-Dowleh (سعدالدوله) and Samsam al-Saltaneh (صمصامالسلطنه), was an Iranian Prime Minister and a leader of the Iranian Constitutional Revolution. He was elected Prime Minister for two terms, first from 3 May 1909 to 16 July 1909 and again from 23 December 1912 to 17 January 1913, when he resigned from the office. He was a representative of Parliament of Iran from Tehran in the 4th Parliament. He was the older brother of Ali-Qoli Khan Bakhtiari, better known as Sardar Assad, Bibi Maryam Bakhtiari and Khosrou Khan, Sardar Zafar Bakhtiari. He died in 1930 in Isfahan.