1st(1st leg) AS Roma - IFK Göteborg 3:0 (0:0)
2nd (2nd leg) IFK Göteborg - AS Roma 2:1 (1:0)
1st(1st leg): 14/09/1983 2nd (2nd leg): 28/09/1983 Winner: AS Roma
1st(1st leg) Lech Poznań - Athletic Club 2:0 (2:0)
2nd (2nd leg) Athletic Club - Lech Poznań 4:0 (2:0)
1st(1st leg): 14/09/1983 2nd (2nd leg): 28/09/1983 Winner: Athletic Club
1st(1st leg) SL Benfica - Linfield FC 3:0 (0:0)
2nd (2nd leg) Linfield FC - SL Benfica 2:3 (1:2)
1st(1st leg): 14/09/1983 2nd (2nd leg): 28/09/1983 Winner: SL Benfica
1st(1st leg) Dinamo Minsk - Grasshopper Club Zürich 1:0 (1:0)
2nd (2nd leg) Grasshopper Club Zürich - Dinamo Minsk 2:2 (1:1)
1st(1st leg): 14/09/1983 2nd (2nd leg): 28/09/1983 Winner: Dinamo Minsk
1st(1st leg) Athlone Town - Standard Liège 2:3 (1:2)
2nd (2nd leg) Standard Liège - Athlone Town 8:2 (4:0)
1st(1st leg): 14/09/1983 2nd (2nd leg): 28/09/1983 Winner: Standard Liège
1st(1st leg) AFC Ajax - Olympiakos Piraeus 0:0 (0:0)
2nd (2nd leg) Olympiakos Piraeus - AFC Ajax 2:0 (0:0, 0:0) aet
1st(1st leg): 14/09/1983 2nd (2nd leg): 28/09/1983 Winner: Olympiakos Piraeus
1st(1st leg) Odense BK - Liverpool FC 0:1 (0:1)
2nd (2nd leg) Liverpool FC - Odense BK 5:0 (3:0)
1st(1st leg): 14/09/1983 2nd (2nd leg): 28/09/1983 Winner: Liverpool FC
1st(1st leg) CSKA Sofia - Omonia Nikosia 3:0 (0:0)
2nd (2nd leg) Omonia Nikosia - CSKA Sofia 4:1 (1:1)
1st(1st leg): 14/09/1983 2nd (2nd leg): 28/09/1983 Winner: CSKA Sofia
1st(1st leg) Raba ETO Győr - Víkingur Reykjavík 2:1 (1:1)
2nd (2nd leg) Víkingur Reykjavík - Raba ETO Győr 0:2 (0:0)
1st(1st leg): 14/09/1983 2nd (2nd leg): 28/09/1983 Winner: Raba ETO Győr
1st(1st leg) Partizan - Viking FK 5:1 (3:1)
2nd (2nd leg) Viking FK - Partizan 0:0 (0:0)
1st(1st leg): 14/09/1983 2nd (2nd leg): 28/09/1983 Winner: Partizan
1st(1st leg) Hamrun Spartans - Dundee United 0:3 (0:2)
2nd (2nd leg) Dundee United - Hamrun Spartans 3:0 (2:0)
1st(1st leg): 14/09/1983 2nd (2nd leg): 28/09/1983 Winner: Dundee United
1st(1st leg) BFC Dynamo - Jeunesse Esch 4:1 (2:1)
2nd (2nd leg) Jeunesse Esch - BFC Dynamo 0:2 (0:1)
1st(1st leg): 14/09/1983 2nd (2nd leg): 28/09/1983 Winner: BFC Dynamo
1st(1st leg) Fenerbahçe - TJ Bohemians ČKD Praha 0:1 (0:0)
2nd (2nd leg) TJ Bohemians ČKD Praha - Fenerbahçe 4:0 (1:0)
1st(1st leg): 14/09/1983 2nd (2nd leg): 28/09/1983 Winner: TJ Bohemians ČKD Praha
1st(1st leg) FC Kuusysi (old) - Dinamo Bucureşti 0:1 (0:0)
2nd (2nd leg) Dinamo Bucureşti - FC Kuusysi (old) 3:0 (0:0)
1st(1st leg): 14/09/1983 2nd (2nd leg): 28/09/1983 Winner: Dinamo Bucureşti
1st(1st leg) Rapid Wien - FC Nantes 3:0 (2:0)
2nd (2nd leg) FC Nantes - Rapid Wien 3:1 (2:1)
1st(1st leg): 14/09/1983 18:30 2nd (2nd leg): 28/09/1983 19:00 Winner: Rapid Wien