##submission.abstract##
Pterional approach is the most versetile approach in neuro-surgery. It is used for the access to the structures of anterior and middle cranial fossa, so the morphometry of pterion is clinically important. The study was conducted in the department of Anatomy, IIMS & R, Lucknow; on 60 dry human skulls of north Indian origin. The most common type of sutural pattern found was sphenoparietal type (89.2%) followed by stellate type (5%). The average distance of center of pterion from superior edge of midpoint of zygomatic arch was 3.68±0.35 cm on left and 3.71±0.39 cm on the right side and from posterolateral aspect of frontozygomatic suture was 3.11±0.40 cm on the left side and 3.20±0.39 cm on the right side. Average distance measured between the center of pterion and anterosuperior margin of auditory meatus was 5.12±0.32 cm and 5.19±0.59 and to the inferior margin of mastoid process was 8.13±1.45cm and 8.02±0.58 on the left side and right side respectively. These findings can be helpful to locate pterion.