2004 Copa América Group B

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.

Standings
{{legend|#cfc|border=1px solid lightgrey|Teams that advanced to the quarter-finals }} All times are in local, Peru Time (UTC−05:00).
 * Group winners
 * Group runners-up
 * Best two third-placed teams among all groups