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| 1st(1st leg) | UD Las Palmas | - | RCD Mallorca | 3:2 (0:2) | ||
| 2nd (2nd leg) | RCD Mallorca | - | UD Las Palmas | 2:1 (1:1) | ||
| 1st(1st leg): 02/12/1997 | 2nd (2nd leg): 07/01/1998 | Winner: RCD Mallorca | ||||
| 1st(1st leg) | Recreativo Huelva | - | RC Celta | 0:1 (0:0) | ||
| 2nd (2nd leg) | RC Celta | - | Recreativo Huelva | 5:2 (2:0) | ||
| 1st(1st leg): 03/12/1997 | 2nd (2nd leg): 07/01/1998 | Winner: RC Celta | ||||
| 1st(1st leg) | UE Figueres | - | Valencia CF | 1:1 (0:1) | ||
| 2nd (2nd leg) | Valencia CF | - | UE Figueres | 2:1 (0:1, 1:1) aet | ||
| 1st(1st leg): 03/12/1997 | 2nd (2nd leg): 07/01/1998 | Winner: Valencia CF | ||||
| 1st(1st leg) | Novelda CF | - | Real Zaragoza | 2:2 (2:1) | ||
| 2nd (2nd leg) | Real Zaragoza | - | Novelda CF | 5:1 (3:0) | ||
| 1st(1st leg): 03/12/1997 | 2nd (2nd leg): 07/01/1998 | Winner: Real Zaragoza | ||||
| 1st(1st leg) | Lorca CF | - | CP Mérida | 2:0 (1:0) | ||
| 2nd (2nd leg) | CP Mérida | - | Lorca CF | 4:1 (2:0) | ||
| 1st(1st leg): 03/12/1997 | 2nd (2nd leg): 07/01/1998 | Winner: CP Mérida | ||||
| 1st(1st leg) | CD Alavés | - | SD Compostela | 1:0 (1:0) | ||
| 2nd (2nd leg) | SD Compostela | - | CD Alavés | 2:2 (1:0) | ||
| 1st(1st leg): 03/12/1997 | 2nd (2nd leg): 06/01/1998 | Winner: CD Alavés | ||||
| 1st(1st leg) | CA Osasuna | - | Racing Santander | 3:0 (1:0) | ||
| 2nd (2nd leg) | Racing Santander | - | CA Osasuna | 2:0 (0:0) | ||
| 1st(1st leg): 03/12/1997 | 2nd (2nd leg): 07/01/1998 | Winner: CA Osasuna | ||||
| 1st(1st leg) | CF Extremadura | - | UD Salamanca | 1:0 (0:0) | ||
| 2nd (2nd leg) | UD Salamanca | - | CF Extremadura | 2:1 (1:0) | ||
| 1st(1st leg): 03/12/1997 | 2nd (2nd leg): 08/01/1998 | Winner: CF Extremadura | ||||
| 1st(1st leg) | Xerez CD | - | Real Sociedad | 1:0 (0:0) | ||
| 2nd (2nd leg) | Real Sociedad | - | Xerez CD | 4:2 (3:0) | ||
| 1st(1st leg): 04/12/1997 | 2nd (2nd leg): 07/01/1998 | Winner: Real Sociedad | ||||
