Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 01/1991 |  | Irazoki | DF |  | Real Sociedad | Real Sociedad |
| 07/1990 | | Pachi | GK | | Real Sociedad | Real Sociedad |
| 07/1990 | | Aldalur | DF |  | Real Sociedad B | Real Sociedad B |
| 07/1990 | | Artetxe | MF | |||
| 07/1990 | | Etxarri | MF | |||
| 07/1990 |  | Anel Karabeg | MF |  | Burgos CF | Burgos CF |
| 07/1990 | | Igoa | FW | | Real Sociedad | Real Sociedad |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/1990 | | Eléder | DF |  | Athletic Club B | Bilbao B |
| 07/1990 | | Félix Gallastegi | MF |  | Sestao River | Sestao River |