2008–09 R.S.C. Anderlecht season Players in Players in

| Name_ | Country | Type_ | Moving_from | Transfer_window | Transfer_fee |
|---|---|---|---|---|---|
| Bernárdez | HON | Transferred | Motagua | Winter | Undisclosed |
| Bulykin | RUS | Transferred | Bayer Leverkusen | Summer | € 1m |
| Cordier | BEL | Transferred | Brussels | Winter | Undisclosed |
| De Sutter | BEL | Transferred | CercleBrugge | Winter | Undisclosed |
| Iakovenko | UKR | Transferred | Genk | Summer | Undisclosed |
| Kanu | BRA | Transferred | Barueri | Summer | Undisclosed |
| Kayouté | SEN | Transferred | Brussels | Summer | Undisclosed |
| Kruiswijk | NED | Transferred | Groningen | Summer | Free |
| Losada | ARG | Transferred | Germinal Beerschot | Summer | Undisclosed |
| Rnić | SRB | Transferred | Partizan | Summer | Free |
| Servaes | BEL | Transferred | Brussels | Summer | Undisclosed |
| Suárez | ARG | Transferred | Belgrano | Summer | € 1.2m |