The 56-year-old, who starred in and directed the acclaimed 1995 film "La Haine" and his role alongside Audrey Tautou in the beloved 2001 film "Amélie", was on an advanced motorcycle training course at the time of the incident.
Reports from French media indicate that he has been "seriously injured", having sustained head trauma and a fractured pelvis.
According to Agence France-Presse, he had been undertaking motorcycle training for an upcoming movie role.
During the accident, one of his daughters was riding a motorbike behind him with an instructor, who witnessed the incident, as reported by Le Parisien.
Kassovitz was subsequently transported to Kremlin-Bicêtre hospital, as confirmed by authorities in Essonne, located south of the French capital.