Sghair Ould M'Bareck (born 1954) has been the Prime Minister of Mauritania since July 6 2003, when he was appointed by President Maaouya Ould Sid'Ahmed Taya following an attempted coup. He replaced Cheik El Avia Ould Mohamed Khouna who came from the same part of eastern Mauritania as many of the accused coup plotters.

Ould M'Bareck had previously been Justice Minister.