The open markets system in Paris is based on temporary ocupations of the public rights of way, mainly for food sales. The aim is to provide citizens with a choice of quality fresh food. There are 82 food markets in the city, with three bio markets. The opening times vary, and there are usually several markets open each day. According to studies by the  Institut d’Aménagement et Urbanisme de la Région Ile-de-France, there are more fishmongers and cheese sellers in the open air markets than in  conventional brick and mortar shops, as the products have better sales through this channel.

Markets are managed by firms that have concession contracts for six years terms, assuming the conduct of the business and renting sales positions to sellers, as well as basic services as electricity and water. They pay a right of use of public spaces to the city, as well as a quota to the municipal street cleaning service, an essential item for public hygiene and health.