2004–05 UEFA Cup first round
The first round of the 2004–05 UEFA Cup began on 13 September 2004, which narrowed clubs down to 40 teams in preparation for the group stage.
All times are CET, as listed by UEFA.
Teams
The following 80 teams participated in the first round.| Key to colours |
| Winners of first round advanced to group stage |
'''Notes'''
Seeding
The 80 teams were split into eight groups of ten teams; five seeded teams and five unseeded teams.Summary
Matches
GAK won 5–1 on aggregate.----
Lazio won 6–0 on aggregate.
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Beşiktaş won 2–1 on aggregate.
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Lille won 4–2 on aggregate.
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Heart of Midlothian won 5–3 on aggregate.
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Austria Wien won 4–1 on aggregate.
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Benfica won 5–0 on aggregate.
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Partizan won 3–1 on aggregate.
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Parma won 3–2 on aggregate.
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Zaragoza won 4–2 on aggregate.
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Sporting CP won 2–0 on aggregate.
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Newcastle United won 7–1 on aggregate.
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Steaua București won 4–3 on aggregate.
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5–5 on aggregate; Dinamo Tbilisi won on away goals.
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Utrecht won 4–3 on aggregate.
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Ferencváros won 4–2 on aggregate.
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Schalke 04 won 9–1 on aggregate.
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Dnipro Dnipropetrovsk won 2–1 on aggregate.
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Basel won 3–1 on aggregate.
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Feyenoord won 5–1 on aggregate.
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Auxerre won 3–1 on aggregate.
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Sevilla won 4–1 on aggregate.
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AEK Athens won 2–1 on aggregate.
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1–1 on aggregate; Standard Liège won on away goals.
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Zenit Saint Petersburg won 6–1 on aggregate.
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Athletic Bilbao won 4–3 on aggregate.
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VfB Stuttgart won 7–1 on aggregate.
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Panionios won 3–2 on aggregate.
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Heerenveen won 5–0 on aggregate.
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Beveren won 2–1 on aggregate.
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Dinamo Zagreb won 2–0 on aggregate.
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Alemannia Aachen won 5–1 on aggregate.
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Middlesbrough won 4–1 on aggregate.
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Club Brugge won 6–1 on aggregate.
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AZ won 5–3 on aggregate.
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Amica Wronki won 2–1 on aggregate.
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Sochaux won 9–0 on aggregate.
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Egaleo won 2–1 on aggregate.
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1–1 on aggregate; Rangers won 4–2 on penalties.
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''Villarreal won 5–1 on aggregate.''