Abstract: A endoscopic orbital floor splint for placement in a maxillary sinus for supporting an orbital floor having a pedicle portion with an upper surface and lower surface, and a support portion extending below the lower surface of the pedicle portion which is adapted to force pedicle portion upwardly to support the orbital floor. The pedicle portion can be generally triangular shaped with rounded corners and an inferior optical nerve notch formed on one side thereof, and the support portion can be generally ring-shaped or be an elongate leg shape. Optionally, a neck can be provided between the pedicle portion and the support portion. The endoscopic orbital floor splint is formed of biocompatible flexible and resilient material, such as silicone rubber.