| Date | Player | From | To | Amount |
|---|---|---|---|---|
| 31 Aug 17 | Simone Lo Faso | PXXPAL | FXXFIO | Loan |
| 31 Aug 17 | Nenad Tomovic | FXXFIO | CVXCVO | Loan |
| 30 Aug 17 | Cyril Thereau | UXXUDN | FXXFIO | 1500000 |
| 28 Aug 17 | Vincent Laurini | EXXEMP | FXXFIO | Loan |
| 22 Aug 17 | Nikola Kalinic | FXXFIO | AMXMIL | Loan |
| 18 Aug 17 | Germán Pezzella | RBXBET | FXXFIO | Loan |
| 18 Aug 17 | Germán Pezzella | RBXBET | FXXFIO | Loan |
| 16 Aug 17 | Giovanni Simeone | GXXGEN | FXXFIO | 18000000 |
| 15 Aug 17 | Gil Dias | AMXMON | FXXFIO | Loan |
| 15 Aug 17 | Gil Dias | AMXMON | FXXFIO | Loan |
| 09 Aug 17 | Marco Benassi | TXXTOR | FXXFIO | Undisclosed |
| 09 Aug 17 | Valentin Eysseric | NXXNICE | FXXFIO | Undisclosed |
| 09 Aug 17 | Valentin Eysseric | NXXNICE | FXXFIO | Undisclosed |
| 02 Aug 17 | Matías Vecino | FXXFIO | IXXINT | 24000000 |
| 27 Jul 17 | Ciprian Tatarusanu | FXXFIO | NXXNANT | 3000000 |
| 27 Jul 17 | Ciprian Tatarusanu | FXXFIO | NXXNANT | Undisclosed |
| 27 Jul 17 | Ciprian Tatarusanu | FXXFIO | NXXNANT | 3000000 |
| 27 Jul 17 | Ciprian Tatarusanu | FXXFIO | NXXNANT | Undisclosed |
| 25 Jul 17 | Jordan Veretout | AVXAVL | FXXFIO | Undisclosed |
| 25 Jul 17 | Jordan Veretout | AVXAVL | FXXFIO | Undisclosed |
| 24 Jul 17 | Federico Bernardeschi | FXXFIO | JXXJUV | 40,000,000 |
| 17 Jul 17 | Rafik Zekhnini | OBXODDS | FXXFIO | 1500000 |
| 12 Jul 17 | Martin Graiciar | SLXSlovan Liberec | FXXFIO | Undisclosed |
| 11 Jul 17 | Borja Valero | FXXFIO | IXXINT | Undisclosed |
| 05 Jul 17 | Josip Ilicic | FXXFIO | AXXATA | 5500000 |
| 04 Jul 17 | Josip Ilicic | FXXFIO | AXXATA | Undisclosed |
| 01 Jul 17 | PXXPAL | FXXFIO | Undisclosed | |
| 01 Jul 17 | Bruno Gaspar | GXXGUI | FXXFIO | Undisclosed |
| 01 Jul 17 | PXXPAL | FXXFIO | Undisclosed | |
| 01 Jul 17 | Nikola Milenkovic | PBXPartizan Belgrade | FXXFIO | 5,100,000 |
| 28 Jan 17 | Riccardo Saponara | EXXEMP | FXXFIO | Loan |
| 25 Jan 17 | Mauro Zárate | FXXFIO | WXXWAT | Undisclosed |
| 25 Jan 17 | Mauro Zárate | FXXFIO | WXXWAT | Undisclosed |