Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 01/2018 |  | Dani Santigosa | DF | |||
| 01/2018 | | Beñat Gaubeka | MF | |||
| 01/2018 | | Iosu Villar | MF | |||
| 07/2017 | | Unai Etxebarria | GK |  | Athletic Club B | Bilbao B |
| 07/2017 | | Aitor Morcillo | DF |  | Sestao River | Sestao River |
| 07/2017 | | Alain | DF |  | Aris Limassol | Aris Limassol |
| 07/2017 |  | Luca Ferrone | DF |  | UD Logroñés | UD Logroñés |
| 07/2017 | | Óscar Pérez | DF |  | Barakaldo CF | Barakaldo CF |
| 07/2017 | | Aitor Aspas | MF |  | CD Guijuelo | CD Guijuelo |
| 07/2017 | | Alex Iriondo | MF | | Barakaldo CF | Barakaldo CF |
| 07/2017 | | Goti | MF |  | Marbella FC | Marbella |
| 07/2017 | | Jorge Cortés | MF | |||
| 07/2017 | | Magdaleno | MF | | Sestao River | Sestao River |
| 07/2017 | | Nico Baleani | MF | |||
| 07/2017 | | Yosu Camporro | MF |  | CD Lealtad | Lealtad |
| 07/2017 | | Josu Juste | FW | |||
| 07/2017 | | Leandro Martínez | FW | | Sestao River | Sestao River |
| 07/2017 | | Yurrebaso | FW | | Barakaldo CF | Barakaldo CF |
| 07/2017 | | Lambea | MA |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 01/2018 | | Undabarrena | MF |  | CD Mirandés | Mirandés |
| 07/2017 | | Erik Polanco | DF |  | Peña Deportiva | Peña |
| 07/2017 | | Jorge García | MF |  | SD Ponferradina | Ponferradina |
| 07/2017 | | Pedro Capó | MF |  | CE Sabadell | Sabadell |
| 07/2017 | | Sergi Arimany | FW |  | SJK Seinäjoki | SJK |
| 07/2017 | | Diego Simón | DF |  | CD Ebro | CD Ebro |
| 07/2017 | | Picón | MF | | Barakaldo CF | Barakaldo CF |
| 07/2017 | | Aldalur | DF |  | Racing Ferrol | Racing Ferrol |
| 07/2017 | | Arregi | DF |  | CD El Ejido 2012 | El Ejido |
| 07/2017 | | Javi Duro | DF |  | CD Numancia | Numancia |
| 07/2017 | | Jon Vega | DF |  | UB Conquense | UB Conquense |
| 07/2017 | | Fran Sota | MF | | Racing Ferrol | Racing Ferrol |
| 07/2017 | | Kike Tortosa | FW |  | FC Vilafranca | FC Vilafranca |
| 07/2017 | | Xesc Regis | FW |  | CD Vitoria | CD Vitoria |
| 07/2017 | | Igor Gordobil | MA | | CD Vitoria | CD Vitoria |