See main article: article and 2004 UEFA European Under-21 Championship qualification. The play-off first legs were played on 14–16 November 2003, while the second legs were played on 18–19 November 2003. Winners of play-off round qualified to the championship played following year in May and June, where Germany was chosen to host the fixtures.For the draw of the play-offs, every of the six best runners-up were drawn against one of the six best group winners of another group with the runners-up playing their first match at home. The other group-winners were drawn each other.
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Serbia and Montenegro won 5–4 on aggregate----Germany won 2–1 on aggregate----Croatia won 2–1 on aggregate----3–3 on aggregate, Portugal won 4–1 on penalties.----3–3 on aggregate, Switzerland won 4–3 on penalties.----Belarus won 5–1 on aggregate----1–1 on aggregate, Italy won on away goals rule.----Sweden won 3–1 on aggregate