معاوية ولد سيدي أحمد الطايع
Sghair Ould M'Bareck (; born 1954) is a Mauritanian politician. He was the 9th Prime Minister of Mauritania from July 6, 2003, when he was appointed by President Maaouya Ould Sid'Ahmed Taya following an attempted coup in the previous month, until August 7, 2005, when he resigned following a successful coup against Taya. Ould M'Bareck is a Haratin.