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| 1st(1st leg) | Rapid Wien | - | Galatasaray | 4:0 (3:0) | ||
| 2nd (2nd leg) | Galatasaray | - | Rapid Wien | 3:5 (2:3) | ||
| 1st(1st leg): 24/08/1966 | 2nd (2nd leg): 07/09/1966 | Winner: Rapid Wien | ||||
| 1st(1st leg) | Skeid Fotball | - | Real Zaragoza | 3:2 (1:0) | ||
| 2nd (2nd leg) | Real Zaragoza | - | Skeid Fotball | 3:1 (1:0) | ||
| 1st(1st leg): 30/08/1966 | 2nd (2nd leg): 12/10/1966 | Winner: Real Zaragoza | ||||
| 1st(1st leg) | Servette FC | - | ÅIFK Turku | 1:1 (1:0) | ||
| 2nd (2nd leg) | ÅIFK Turku | - | Servette FC | 1:2 (0:1) | ||
| 1st(1st leg): 14/09/1966 | 2nd (2nd leg): 05/10/1966 | Winner: Servette FC | ||||
| 1st(1st leg) | Floriana FC | - | RC&FC Sparta | 1:1 (0:1) | ||
| 2nd (2nd leg) | RC&FC Sparta | - | Floriana FC | 6:0 (3:0) | ||
| 1st(1st leg): 18/09/1966 | 2nd (2nd leg): 05/10/1966 | Winner: RC&FC Sparta | ||||
| 1st(1st leg) | Standard Liège | - | Apollon Limassol | 5:1 (2:0) | ||
| 2nd (2nd leg) | Apollon Limassol | - | Standard Liège | 0:1 (0:0) | ||
| 1st(1st leg): 18/09/1966 | 2nd (2nd leg): 05/10/1966 | Winner: Standard Liège | ||||
| 1st(1st leg) | Swansea Town | - | Slavia Sofia | 1:1 (0:0) | ||
| 2nd (2nd leg) | Slavia Sofia | - | Swansea Town | 4:0 (1:0) | ||
| 1st(1st leg): 21/09/1966 | 2nd (2nd leg): 05/10/1966 | Winner: Slavia Sofia | ||||
| 1st(1st leg) | Glentoran FC | - | Rangers FC | 1:1 (0:1) | ||
| 2nd (2nd leg) | Rangers FC | - | Glentoran FC | 4:0 (2:0) | ||
| 1st(1st leg): 27/09/1966 | 2nd (2nd leg): 05/10/1966 | Winner: Rangers FC | ||||
| 1st(1st leg) | AEK Athen | - | Sporting Braga | 0:1 (0:1) | ||
| 2nd (2nd leg) | Sporting Braga | - | AEK Athen | 3:2 (3:1) | ||
| 1st(1st leg): 28/09/1966 | 2nd (2nd leg): 05/10/1966 | Winner: Sporting Braga | ||||
| 1st(1st leg) | ACF Fiorentina | - | Raba ETO Győr | 1:0 (0:0) | ||
| 2nd (2nd leg) | Raba ETO Győr | - | ACF Fiorentina | 4:2 (2:2) | ||
| 1st(1st leg): 28/09/1966 | 2nd (2nd leg): 05/10/1966 | Winner: Raba ETO Győr | ||||
| 1st(1st leg) | OFK Beograd | - | Spartak Moskva | 1:3 (0:3) | ||
| 2nd (2nd leg) | Spartak Moskva | - | OFK Beograd | 3:0 (0:0) | ||
| 1st(1st leg): 28/09/1966 | 2nd (2nd leg): 05/10/1966 | Winner: Spartak Moskva | ||||
| 1st(1st leg) | Shamrock Rovers | - | Spora Luxemburg | 4:1 (2:1) | ||
| 2nd (2nd leg) | Spora Luxemburg | - | Shamrock Rovers | 1:4 (1:2) | ||
| 1st(1st leg): 28/09/1966 | 2nd (2nd leg): 05/10/1966 | Winner: Shamrock Rovers | ||||
| 1st(1st leg) | TJ Tatran Prešov | - | Bayern München | 1:1 (1:1) | ||
| 2nd (2nd leg) | Bayern München | - | TJ Tatran Prešov | 3:2 (1:0) | ||
| 1st(1st leg): 28/09/1966 | 2nd (2nd leg): 05/10/1966 | Winner: Bayern München | ||||
| 1st(1st leg) | Aalborg BK | - | Everton FC | 0:0 (0:0) | ||
| 2nd (2nd leg) | Everton FC | - | Aalborg BK | 2:1 (0:0) | ||
| 1st(1st leg): 28/09/1966 | 2nd (2nd leg): 11/10/1966 | Winner: Everton FC | ||||
| 1st(1st leg) | BSG Chemie Leipzig | - | Legia Warszawa | 3:0 (0:0) | ||
| 2nd (2nd leg) | Legia Warszawa | - | BSG Chemie Leipzig | 2:2 (1:2) | ||
| 1st(1st leg): 28/09/1966 | 2nd (2nd leg): 12/10/1966 | Winner: BSG Chemie Leipzig | ||||
| 1st(1st leg) | RC Strasbourg | - | CSA Steaua București | 1:0 (0:0) | ||
| 2nd (2nd leg) | CSA Steaua București | - | RC Strasbourg | 1:1 (0:0) | ||
| 1st(1st leg): 05/10/1966 | 2nd (2nd leg): 12/10/1966 | Winner: RC Strasbourg | ||||
