The 2005 Segunda División B play-offs (Playoffs de Ascenso or Promoción de Ascenso) were the final playoffs for promotion from 2004–05 Segunda División B to the 2005–06 Segunda División. The four first placed teams in each of the four Segunda División B groups played the Playoffs de Ascenso and the four last placed teams in Segunda División were relegated to Segunda División B.
Teams for 2004/2005 play-off
- RSD Alcalá
- SD Ponferradina
- AD Ceuta
- Hércules CF
- Sevilla B
- Zamora CF
- CD Castellón
- Universidad de Las Palmas CF
- Alicante CF
- Rayo Vallecano
- Real Zaragoza B
- Lorca Deportiva CF
- Real Unión
- Burgos CF
- UB Conquense
- Real Madrid B
Eliminatories
First round
| June 5, 2005
Home Matches: | |||
| RSD Alcalá | 1-1 | SD Ponferradina | |
| AD Ceuta | 0-1 | Hercules CF | |
| Zamora CF | 0-0 | Sevilla FC B | |
| CD Castellon | 0-0 | Universidad de L.P. CF | |
| Lorca Deportiva | 1-0 | Alicante CF | |
| Rayo Vallecano | 1-1 | Real Unión | |
| Real Zaragoza B | 0-0 | Real Madrid B | |
| Burgos CF | 0-0 | UB Conquense |
| June 12, 2005
Away Matches: | |||
| SD Ponferradina | 0-1 | RSD Alcalá | Agg:1-2 |
| Hercules CF | 2-0 | AD Ceuta | Agg:3-0 |
| Sevilla FC B | 1-1 | Zamora CF | Agg:1-1 |
| Universidad de L.P. CF | 1-2 | CD Castellon | Agg:1-2 |
| Alicante CF | 1-2 | Lorca Deportiva | Agg:1-3 |
| Real Unión | 1-0 | Rayo Vallecano | Agg:2-1 |
| Real Madrid B | 2-0 | Real Zaragoza B | Agg:2-0 |
| UB Conquense | 1-0 | Burgos CF | Agg:1-0 |
Second round
Group A--Second Eliminatory
- Home Match
| 18-Jun-2005 | RSD Alcalá | 1-3 | Hercules CF | Stadium:Virgen del Val (Alcalá de Henares) |
- Away Match
| 26-Jun-2005 | Hercules CF | 1-1 | RSD Alcalá | Stadium:José Rico Pérez (Alicante) |
Promoted to Segunda División: Hércules CF
Group B--Second Eliminatory
- Home Match
| 19-Jun-2005 | Zamora CF | 2-1 | CD Castellón | Stadium:Ruta de la Plata (Zamora) |
- Away Match
| 26-Jun-2005 | CD Castellón | 1-0 | Zamora CF | Stadium:Nou Castalia (Castellón) |
Promoted to Segunda División: CD Castellón
Group C--Second Eliminatory
- Home Match
| 19-Jun-2005 | Lorca CF | 1-2 | Real Unión | Stadium:Francisco Artes Carrasco (Lorca) |
- Away Match
| 26-Jun-2005 | Real Unión | 1-3 | Lorca FC | Stadium:Stadium Gal (Irún) |
Promoted to Segunda División: Lorca Deportiva CF
Group D--Second Eliminatory
- Home Match
| 18-Jun-2005 | UB Conquense | 0-2 | Real Madrid B | Stadium:La Fuensanta (Cuenca) |
- Away Match
| 26-Jun-2005 | Real Madrid B | 0-1 | UB Conquense | Stadium:Santiago Bernabeu (Madrid) |
Promoted to Segunda División: Real Madrid B
This page was last edited on 24 February 2023, at 05:03