| Tourney Name: | European Cup Winners' Cup |
| Year: | 1963–64 |
| Dates: | – |
| Num Teams: | 29 |
| Associations: | 28 |
| Champion Other: | Sporting CP |
| Count: | 1 |
| Second Other: |  MTK Budapest |
| Matches: | 62 |
| Goals: | 202 |
| Attendance: | 1246563 |
| Top Scorer: | Domingos Mascarenhas (Sporting CP) 11 goals |
| Prevseason: | 1962–63 |
| Nextseason: | 1964–65 |
The 1963–64 season of the European Cup Winners' Cup club football tournament was won by Sporting CP in a replayed final victory against MTK Budapest.
|}Bye: Tottenham Hotspur, Motor Zwickau, Linfield
1 Olympiacos beat Zagłębie Sosnowiec 2–0 in a play-off to qualify for the second round.
2 Sporting CP beat Atalanta 3–1 after extra time in a play-off to qualify for the second round.
3 Dinamo Zagreb played LASK in play-off that finished 1–1. Dinamo Zagreb won a coin toss to qualify for the second round.
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Barcelona won 5–1 on aggregate.----Hamburger SV won 7–2 on aggregate.----Lyon won 6–2 on aggregate.----2–2 on aggregate.----Manchester United won 7–2 on aggregate.----3–3 on aggregate.----APOEL won 7–0 on aggregate.----Celtic won 10–1 on aggregate.----1–1 on aggregate.----Borough United won 2–0 on aggregate.----Slovan Bratislava won 12–2 on aggregate.----MTK Budapest won 6–2 on aggregate.----Fenerbahçe won 4–2 on aggregate.
--------1–1 in play-off match. Dinamo Zagreb qualified on a coin toss.
|}
1 Hamburger SV beat Barcelona 3–2 in a play-off to qualify for the quarter-finals.
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4–4 on aggregate.----Lyon won 5–3 on aggregate.----Manchester United won 4–3 on aggregate.----Sporting CP won 18–1 on aggregate.----Celtic won 4–2 on aggregate.----Slovan Bratislava won 4–0 on aggregate.----MTK Budapest won 2–1 on aggregate.----Feberbahçe won 4–3 on aggregate.
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1 MTK Budapest beat Fenerbahçe 2–0 in a play-off to qualify for the semi-finals.
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Lyon won 3–1 on aggregate.----Sporting CP won 6–4 on aggregate.----Celtic won 2–0 on aggregate.----3–3 on aggregate.
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1 Sporting CP beat Lyon 1–0 in a play-off to qualify for the final.
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1–1 on aggregate.----MTK Budapest won 4–3 on aggregate.
See main article: 1964 European Cup Winners' Cup Final.
The top scorers from the 1963–64 European Cup Winners' Cup (including preliminary round) are as follows:
| Rank | Name | Team | Goals |
|---|---|---|---|
| 1 | Domingos Mascarenhas | Sporting CP | 11 |
| 2 |  Nestor Combin | Lyon | 10 |
| 3 | Ernesto Figueiredo | Sporting CP | 6 |
| Denis Law | Manchester United | 6 | |
| 5 | Stevie Chalmers | Celtic | 5 |
| John Hughes | Celtic | 5 | |
| István Kuti | MTK Budapest | 5 | |
 Osvaldo | Sporting CP | 5 | |
| Uwe Seeler | Hamburger SV | 5 |