1st(1st leg) Djurgårdens IF - 1. FC Lokomotive Leipzig 1:3 (0:1)
2nd (2nd leg) 1. FC Lokomotive Leipzig - Djurgårdens IF 2:1 (1:0)
1st(1st leg): 24/08/1966 2nd (2nd leg): 27/09/1966 Winner: 1. FC Lokomotive Leipzig
1st(1st leg) Frigg Oslo FK - Dunfermline Athletic 1:3 (1:1)
2nd (2nd leg) Dunfermline Athletic - Frigg Oslo FK 3:1 (3:1)
1st(1st leg): 24/08/1966 2nd (2nd leg): 28/09/1966 Winner: Dunfermline Athletic
1st(1st leg) Wiener Sport-Club - SSC Napoli 1:2 (1:1)
2nd (2nd leg) SSC Napoli - Wiener Sport-Club 3:1 (3:1)
1st(1st leg): 01/09/1966 2nd (2nd leg): 21/09/1966 Winner: SSC Napoli
1st(1st leg) Aris Saloniki - Juventus 0:2 (0:1)
2nd (2nd leg) Juventus - Aris Saloniki 5:0 (2:0)
1st(1st leg): 11/09/1966 2nd (2nd leg): 21/09/1966 Winner: Juventus
1st(1st leg) Göztepe - Bologna FC 1:2 (0:1)
2nd (2nd leg) Bologna FC - Göztepe 3:1 (2:0)
1st(1st leg): 11/09/1966 2nd (2nd leg): 28/09/1966 Winner: Bologna FC
1st(1st leg) DOS Utrecht - FC Basel 1893 2:1 (1:1)
2nd (2nd leg) FC Basel 1893 - DOS Utrecht 2:2 (0:0)
1st(1st leg): 13/09/1966 2nd (2nd leg): 21/09/1966 Winner: DOS Utrecht
1st(1st leg) Olimpija Ljubljana - Ferencvárosi TC 3:3 (1:1)
2nd (2nd leg) Ferencvárosi TC - Olimpija Ljubljana 3:0 (2:0)
1st(1st leg): 14/09/1966 2nd (2nd leg): 05/10/1966 Winner: Ferencvárosi TC
1st(1st leg) VfB Stuttgart - Burnley FC 1:1 (0:1)
2nd (2nd leg) Burnley FC - VfB Stuttgart 2:0 (0:0)
1st(1st leg): 20/09/1966 2nd (2nd leg): 27/09/1966 Winner: Burnley FC
1st(1st leg) OGC Nice - Örgryte IS 2:2 (0:1)
2nd (2nd leg) Örgryte IS - OGC Nice 2:1 (0:0)
1st(1st leg): 21/09/1966 2nd (2nd leg): 27/09/1966 Winner: Örgryte IS
1st(1st leg) Crvena Zvezda - Athletic Club 5:0 (2:0)
2nd (2nd leg) Athletic Club - Crvena Zvezda 2:0 (0:0)
1st(1st leg): 21/09/1966 2nd (2nd leg): 28/09/1966 Winner: Crvena Zvezda
1st(1st leg) Union Luxembourg - Royal Antwerp FC 0:1 (0:1)
2nd (2nd leg) Royal Antwerp FC - Union Luxembourg 1:0 (1:0)
1st(1st leg): 21/09/1966 2nd (2nd leg): 28/09/1966 Winner: Royal Antwerp FC
1st(1st leg) FC Porto - Girondins Bordeaux 2:1 (0:0)
2nd (2nd leg) Girondins Bordeaux - FC Porto 2:1 (1:1, 2:1) aet
1st(1st leg): 21/09/1966 2nd (2nd leg): 05/10/1966
1st(1st leg) Drumcondra Dublin - Frankfurter SG Eintracht 0:2 (0:2)
2nd (2nd leg) Frankfurter SG Eintracht - Drumcondra Dublin 6:1 (3:1)
1st(1st leg): 21/09/1966 2nd (2nd leg): 05/10/1966 Winner: Frankfurter SG Eintracht
1st(1st leg) 1. FC Nürnberg - Valencia CF 1:2 (1:2)
2nd (2nd leg) Valencia CF - 1. FC Nürnberg 2:0 (2:0)
1st(1st leg): 21/09/1966 2nd (2nd leg): 05/10/1966 Winner: Valencia CF
1st(1st leg) TJ Spartak ZJŠ Brno - Dinamo Zagreb 2:0 (1:0)
2nd (2nd leg) Dinamo Zagreb - TJ Spartak ZJŠ Brno 2:0 (1:0, 2:0) aet
1st(1st leg): 21/09/1966 2nd (2nd leg): 05/10/1966
1st(1st leg) Dinamo Pitești - Sevilla FC 2:0 (2:0)
2nd (2nd leg) Sevilla FC - Dinamo Pitești 2:2 (1:0)
1st(1st leg): 28/09/1966 2nd (2nd leg): 05/10/1966 Winner: Dinamo Pitești