The Maritime Museum of Barcelona (Catalan: Museu Marítim de Barcelona, MMB) is located in the building of Drassanes Reials de Barcelona, the royal arsenal of Barcelona, dedicated to shipbuilding between the thirteenth century and eighteenth century. The first mention of these arsenals date from 1243 in a document indicating the boundaries of the city of Barcelona where it mentions its shipyard.

It shows the history of the navigation from the early days together with the history of the Spanish Navy since the Catholic Monarchs, in the 15th century, up to the present. It also hosts several navigation instruments, weapons, portolans and paintings. The museum was declared Museum of National Interest by the Government of Catalonia.