| Tourney Name: | Inter-Cities Fairs Cup |
| Year: | 1963–64 |
| Dates: | – |
| Num Teams: | 32 |
| Champion Other: |  Zaragoza |
| Count: | 1 |
| Second Other: | Valencia |
| Matches: | 65 |
| Prevseason: | 1962–63 |
| Nextseason: | 1964–65 |
The sixth Inter-Cities Fairs Cup was played over the 1963–64 season. The competition was won by Zaragoza in a one-off final at Camp Nou in Barcelona against fellow Spaniards and defending champions Valencia. There was only one representative city team, from Copenhagen, with established sides filling all the other slots.
|}1 Lausanne-Sport won 3–2 after extra time in a play-off to advance to the second round.2 Juventus won 1–0 in a play-off to advance to the second round.
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Valencia won 3–2 on aggregate.----OFK Beograd 3–3 Juventus on aggregate.
Juventus won 1–0 in play-off.---- Atlético Madrid won 2–1 on aggregate.----Lokomotiv Plovdiv won 5–2 on aggregate.----Roma won 5–1 on aggregate.---- Belenenses won 4–1 on aggregate.
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Juventus won 3–1 on aggregate.----Roma won 3–1 on aggregate.
|}3 RFC Liegeois won 1–0 in a play-off in Liège to advance to the semi-finals.
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Real Zaragoza won 3–2 on aggregate.----Köln won 5–3 on aggregate.
|}4 Real Zaragoza won 2–0 in a play-off in Zaragoza to advance to the final.
See main article: 1964 Inter-Cities Fairs Cup Final.