Abstract : Sacrum is a wedged shaped bone forming the caudal end of the vertebral column, formed by the fusion of five sacral vertebras. The opening present at the caudal end of sacral canal is known as sacral Hiatus. Epidural anesthesia is a special type of anesthesia, administered in sacral Hiatus. Anatomical landmarks and the knowledge of the actual shape and size of sacral hiatus and its variations play a major role in the success of caudal anesthesia. The purpose of present study is to find out the morphological and morphometrical characteristic of sacral hiatus in male and female sacrum. The present study was conducted in the Department of Anatomy, LN. MEDICAL COLLEGE & REASERCH CENTER, This study consists of 70 dry, undamaged human sacrum of unknown age, sex. Anatomical measurements were taken by using verniercalipers. In present study, it was observed that 31 (44.2%) sacrums were belongs to male and 39 (55.8%) were belongs to female. The most common shape was Inverted V (54.3%). Mean length of sacral hiatus was 15.2 ± 8.07mm, where females higher (15.8 ± 9.0 mm) compare to males (14.4 ± 6.6mm). Antero posterior diameter at apex was 6.59 ± 1.89mm where in males (6.7 ± 2.1mm) high compare to female (6.4± 1.7mm) and at base, it was 13.5 ± 3.2mm., where in females (14.0 ± 3.2mm) high compare to males (12.9 ± 3.1mm). But these associations were not statistically significant. (P>0.05) In present study did not found any variations in the shape of the sacral hiatus. The parameters of sacral hiatus like length, transverse diameter and A -P diameter of sacral hiatus also not shown any significance.