The 1999–2000 Slovenian Ice Hockey League season was the ninth season of the Slovenian Ice Hockey League. Olimpija won the league championships.
| Place | Team | Pts | GP | W | T | L | GF–GA | Diff |
| 1 | Olimpija | 26 | 14 | 13 | 0 | 1 | 115–33 | +82 |
| 2 | Jesenice | 24 | 14 | 12 | 0 | 2 | 99–26 | +73 |
| 3 | Slavija | 20 | 14 | 10 | 0 | 4 | 89–35 | +54 |
| 4 | Bled | 16 | 13 | 8 | 0 | 5 | 77–72 | +5 |
| 5 | MARC Interieri | 11 | 14 | 5 | 1 | 8 | 49–64 | –15 |
| 6 | Kranjska Gora | 8 | 13 | 4 | 0 | 9 | 36–68 | –32 |
| 7 | Celje | 3 | 14 | 1 | 1 | 12 | 31–112 | –81 |
| 8 | Triglav Kranj | 2 | 14 | 1 | 0 | 13 | 33–111 | –78 |
| Place | Team | Pts | GP | W | T | L | GF–GA | Diff |
| 1 | Olimpija | 23 (4) | 12 | 9 | 1 | 2 | 57–29 | +28 |
| 2 | Jesenice | 20 (3) | 12 | 7 | 3 | 2 | 53–30 | +23 |
| 3 | Slavija | 10 (2) | 12 | 3 | 2 | 7 | 32–51 | –19 |
| 4 | Bled | 5 (1) | 12 | 1 | 2 | 9 | 32–64 | –32 |
| Place | Team | Pts | Team | W | T | L | GF–GA | Diff |
| 5 | Kranjska Gora | 10 (3) | 6 | | | | 31–28 | +3 |
| 6 | Triglav Kranj | 10 (1) | 6 | | | | 41–19 | +22 |
| 7 | Interieri | 10 (4) | 6 | | | | 26–23 | +3 |
| 8 | Celje | 4 (2) | 6 | | | | 12–40 | –28 |
- 21 March 2000: Olimpija – Jesenice: 5–1 (2–0, 3–0, 0–1)
- 23 March 2000: Jesenice – Olimpija : 1–2 OT (1–1, 0–0, 0–0, 0–1)
- 25 March 2000: Olimpija – Jesenice: 4–1 (1–1, 1–0, 2–0)
- 28 March 2000: Jesenice – Olimpija : 1–2 (0–0, 1–0, 0–2)
- Slavija – Bled: 3–2
- Bled – Slavija : 4–0
- Slavija – Bled: 5–1
- Bled – Slavija : 2–3
- Kranjska Gora – Triglav Kranj: 4–2
- Triglav Kranj – Kranjska Gora: 3–4
