The South American Junior Rugby Championship is an annual rugby union competition that features teams from South America. The tournament began in 1972 with Argentina as the host, which saw the locals win the title. It was not until 2008 that the first official Division B tournament was held, which was won by Brazil. In 2014, an addition competition was added, the CONSUR Cup, which was contested by Argentina and the top team of the A Division that year.
In 1999, the minimum age permitted was changed from U18 to U19. Since 2004, the tournament champion (excluding Argentina) qualifies to the next year's World Rugby U20 Trophy, organised by the World Rugby. Argentina automatically qualified for the World Rugby Under 20 Championship.