Group B of the 2004 Copa América was one of the three groups of competing nations in the
2004 Copa América. It comprised
Argentina,
Ecuador,
Mexico, and
Uruguay. Group play ran from 7 to 13 July 2004.
Mexico won the group and faced
Brazil—the runners-up of
Group C—in the quarter-finals. Argentina finished second and faced
Peru—the runners-up of
Group A—in the quarter-finals. Uruguay finished third and faced
Paraguay, the winners of
Group C, in the quarter-finals. Ecuador finished fourth in the group, and were eliminated from the tournament.