The 2004 24 Hours of Le Mans was a non-championship 24 hour automobile endurance race held from 12 to 13 June at the Circuit de la Sarthe near Le Mans, France, for teams of three drivers each fielding Le Mans Prototype and Grand Touring cars. It was the race's 72nd edition, as organised by the automotive group, the Automobile Club de l'Ouest (ACO) since 1923. A test day was held eight weeks before the race on 25 April. Approximately 200,000 people attended the race.