The M'zab, or Mzab (Mozabite: Aghlan, Arabic: مزاب, romanized: Mzāb), is a natural region of the northern Sahara Desert in Ghardaïa Province, Algeria.

Ghardaia (Taghardait) is the main town and capital of the M'zab, and El Atteuf (Tajnint) is the oldest settlement in the region.

Melika (At Mlichet) is populated by a kabily town named Mlikch which is until now located near Bouira, and it contains spacious cemeteries and a historical Mosque in the centre of the ksar, and Bounoura (At Bounour) is a historical ksar which contain Azwil palm grove, while El Guerrara (Igraren) and Berriane (Iberguen) have been part of the M'zab since the 17th century.

That is one of the major oasis groups of the Sahara Desert and is bounded by arid country known as chebka, crossed by dry river beds.

The M'zab Valley was listed as a UNESCO World Heritage Site in 1982, as an intact example of traditional human habitat perfectly adapted to the environment.

A federal council, Majlis Ammi Said, unites representatives of the seven settlements as well as Ouargla, an ancient town located 200 km South-East of the Mzab valley.

Numerous details of Ibāḍiyya social life are ruled by this Islamic government, such as the weight of gold given as a dowry to a woman (maximum 60 g) to the length of wedding celebrations (three days).