Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 01/1999 |  | Husein Beganović | DF |  | KF Shkupi | KF Shkupi |
| 01/1999 |  | Adem Kapič | MF |  | MSV Duisburg | Duisburg |
| 08/1998 |  | Yasuyuki Moriyama | FW | |||
| 07/1998 | | Edi Bajrektarevič | DF | |||
| 07/1998 | | Edmond Gunjač | DF |  | NK Primorje | NK Primorje |
| 07/1998 | | Aleš Kokot | DF | |||
| 07/1998 |  | Komi Tchangaï | DF |  | CA Bizertin | CAB |
| 07/1998 | | Erik Cirkvencic | MF |  | ND Mura 05 | ND Mura |
| 07/1998 | | Anton Žlogar | MF | | NK Primorje | NK Primorje |
| 07/1998 |  | Mahir Halili | FW |  | Neuchâtel Xamax FCS | Xamax |
| 07/1998 | | Tomaž Žniderčič | FW |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/1998 |  | Aleksandar Đorđević | DF |  | FC Zürich | FC Zürich |
| 07/1998 | | Erik Kržišnik | DF | | NK Primorje | NK Primorje |
| 07/1998 |  | Siniša Jukić | MF |  | Olimpija Ljubljana | Olimpija |
| 07/1998 | | Andrej Komac | MF | | NK Primorje | NK Primorje |
| 07/1998 | | Nenad Protega | MF |  | NK Domžale | NK Domžale |
| 07/1998 | | Milan Osterc | FW |  | Hércules CF | Hércules |
| 07/1998 | | Srečko Katanec | MA |  | Slovenia | Slovenia |