Background: Foramen lacerum is one of the foramen at the base of skull lies between the occipital bone and the petrosal portion of the temporal boneand sphenoid bone It allows passage of internal carotid artery ,ascending pharyngeal artery and emissary veins from the cavernous sinus. Variability in anatomical aspect of this foramen has been studied by many workers in different part of the world.
Aims & Objective:To study the variability in shape and size of  foramen lacerum.
Materials and Methods: Present study has been designed to study on 100 skulls (100×2=200 foramen).
Result: The mean AP. diameter on right was10.89mm,and on left it was10.88mm.The mean transverse diameter on right was6.85mm ,on the left 6.59mm.
Conclusion: The clinical significance of foramen lacerum is important during surgeries. Therefore, the dimensions of foramen lacerum is  much necessary.