Unitary Left[2] (Gauche unitaire, GU) was a political party in France that was originally faction (under the name Unir or Unite) within the Revolutionary Communist League.

The party is led by Christian Picquet, a former member of the Revolutionary Communist League.

The creation of the party was announced on 8 March 2009 at the founding congress of the Left Front electoral coalition ahead of the 2009 European elections.

Picquet, whose opposition faction represented 3.7% at the founding congress of the New Anticapitalist Party, disagreed with the majority's refusal to ally with the Communist-led Left Front for the European elections.

Ideologically, the party sought to unite all democratic socialists opposed to neo-liberalism under a common front.