The Movement of Social Democrats (French: Mouvement des Démocrates Socialistes, Arabic: Hizb al-Dimocratiyin al-Ishtirakiyin) is an opposition political party in Tunisia. It is the major opposition party with 13 seats in the Tunisian parliament.

In 2001 the then party leader Mohamed al Mouadda was charged with having formed a pact with the banned islamist group Al Nahda.

See also: List of political parties in Tunisia, Politics of Tunisia

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