| th width="25%" align=left>Term | Incumbent | Affiliation | Notes |
| a href="/encyclopedia/21-May" title="21 May">21 May 1957 to 16 July 1958 | Moktar Ould Daddah, Vice President of the Government Council | UPM |
| i>16 July 1958 to 28 November 1958 | Moktar Ould Daddah, President of the Council of Government | UPM |
| i>28 November 1958 to 26 June 1959 | Moktar Ould Daddah, President of the Provisional Government | UPM/PRM/PPM |
| i>26 June 1959 to 20 August 1961 | Moktar Ould Daddah, Prime Minister | UPM/PRM/PPM |
| a href="/encyclopedia/6-April" title="6 April">6 April 1979 to 27 May 1979 | Ahmed Ould Bouceif, Prime Minister | Mil |
| a href="/encyclopedia/28-May" title="28 May">28 May 1979 to 31 May 1979 | Ahmed Salim Ould Sidi, acting Prime Minister |
| a href="/encyclopedia/31-May" title="31 May">31 May 1979 to 12 December 1980 | Mohamed Khouna Ould Haidalla, Prime Minister | Mil | 1st Term |
| a href="/encyclopedia/12-December" title="12 December">12 December 1980 to 25 April 1981 | Sid Ahmed Ould Bneijara, Prime Minister | n-p |
| a href="/encyclopedia/25-April" title="25 April">25 April 1981 to 8 March 1984 | Maaouya Ould SidAhmed Taya, Prime Minister | Mil | 1st Term |
| a href="/encyclopedia/8-March" title="8 March">8 March 1984 to 12 December 1984 | Mohamed Khouna Ould Haidalla, Prime Minister | Mil | 2nd Term |
| a href="/encyclopedia/12-December" title="12 December">12 December 1984 to 18 April 1992 | Maaouya Ould SidAhmed Taya, Prime Minister | Mil | 2nd Term |
| a href="/encyclopedia/18-April" title="18 April">18 April 1992 to 2 January 1996 | Sidi Mohamed Ould Boubacar, Prime Minister | PRDS |
| a href="/encyclopedia/2-January" title="2 January">2 January 1996 to 18 December 1997 | Cheikh El Avia Ould Mohamed Khouna, Prime Minister | PRDS | 1st Term |
| a href="/encyclopedia/18-December" title="18 December">18 December 1997 to 16 November 1998 | Mohamed Lemine Ould Guig, Prime Minister | PRDS |
| a href="/encyclopedia/16-November" title="16 November">16 November 1998 to 6 July 2003 | Cheikh El Avia Ould Mohamed Khouna, Prime Minister | PRDS | 2nd Term |
| a href="/encyclopedia/6-July" title="6 July">6 July 2003 to present | Sghair Ould MBareck, Prime Minister | PRDS |