Daniel Gluckstein (born 3 March 1953 in Paris) is a French Trotskyist politician best known for running in the French presidential election of 2002 as the candidate of the Workers' Party (Parti des Travailleurs, PT).
In 1991, he was nominated National Secretary of the Parti des Travailleurs.
In 1994, as lead candidate of the Parti des Travailleurs for the European elections, he obtained 0.43% of the vote.
In June 2008, he created the Parti Ouvrier Indépendant together with Gérard Schivardi.
Gluckstein is married, with three children, and is a former professor of history in a professional college.