La Brugeoise cars were Buenos Aires Underground (Subte) Line A rolling stock since its inauguration in 1913 till 2013 when replaced by new Chinese stock. They were built by the Belgian railway rolling stock manufacturer La Brugeoise et Nivelles between 1911 and 1919 for the Anglo-Argentine Tramways Company's first underground line. They were originally designed to run both as metro and tramway cars, but they were refurbished in 1927 for underground use only. They became the oldest underground rolling stock in commercial service in the world as well as a tourist attraction and part of Buenos Aires cultural heritage.

The Buenos Aires Underground, locally known as Subte, is a rapid transit system that serves the area of the city of Buenos Aires, Argentina. The first section of this network opened in 1913, making it the 13th earliest subway network in the world and the first underground railway in Latin America, the Southern Hemisphere, and the Spanish-speaking world, with the Madrid Metro opening five years later, in 1919. As of 2023, Buenos Aires is the only Argentine city with a metro system.