The 2004–2005 LEB season was the 9th season of the Liga Española de Baloncesto, second tier of the Spanish basketball.
| Teams | P | W | L | PF | PA | Qualification or relegation | |
|---|---|---|---|---|---|---|---|
| 1 | 34 | 27 | 7 | 2676 | 2402 | Playoffs | |
| 2 | 34 | 26 | 8 | 2601 | 2405 | ||
| 3 | León Caja España | 34 | 24 | 10 | 2754 | 2477 | |
| 4 | CB Ciudad de Huelva | 34 | 22 | 12 | 2582 | 2434 | |
| 5 | 34 | 20 | 14 | 2580 | 2524 | ||
| 6 | CAI Zaragoza | 34 | 19 | 15 | 2726 | 2608 | |
| 7 | CB Tarragona | 34 | 18 | 16 | 2602 | 2635 | |
| 8 | Cáceres 2016 CB | 34 | 17 | 17 | 2524 | 2507 | |
| 9 | CB Los Barrios | 34 | 17 | 17 | 2753 | 2760 | |
| 10 | 34 | 15 | 19 | 2559 | 2616 | ||
| 11 | 34 | 15 | 19 | 2402 | 2405 | ||
| 12 | 34 | 14 | 20 | 2498 | 2579 | ||
| 13 | 34 | 14 | 20 | 2488 | 2679 | ||
| 14 | 34 | 13 | 21 | 2594 | 2612 | ||
| 15 | Valls Félix Hotel | 34 | 13 | 21 | 2575 | 2694 | |
| 16 | UB La Palma | 34 | 12 | 22 | 2494 | 2580 | Relegation playoffs |
| 17 | Club Ourense Baloncesto | 34 | 11 | 23 | 2419 | 2559 | |
| 18 | Calpe Aguas de Calpe | 34 | 9 | 25 | 2449 | 2800 | Relegated to LEB-2 |
The two winners of the semifinals are promoted to Liga ACB.
Club Ourense Baloncesto, relegated to LEB-2.