The 2004 season was Cienciano's 103rd season since its founding in 1901. The club played the Torneo Descentralizado, the Copa Libertadores and the Recopa Sudamericana.
Competitions
Torneo Descentralizado
Torneo Apertura PosTeamPldWDLGFGAGDPts1Alianza Lima2619434816 +32612Cienciano2618355328+25573Alianza Atlético2615564629 +1750
Results
Torneo Clausura PosTeamPldWDLGFGAGDPts2Universidad San Martín2614574026 +14473Cienciano26111144126+15444Universitario26111053428 +643
Results
Copa Libertadores
Group stage
Recopa Sudamericana
Cienciano defeated Boca Juniors on penalties and was champion of the tournament.
References