Under a stereomicroscope, investigate the intricate architecture of the pit and fissure system of the primary first and second molars. Material and Method: 60 mandibular and maxillary first and second primary molars were collected, cleaned with pumice, water slurry, and preserved in neutral 10% formalin. Using a carborundum disc, the teeth were longitudinally (buccolingually) segmented into thicknesses of 40 to 100 µm. The glass slide with the ground teeth pieces was fixed, and the stereomicroscope was used to magnify the image by 10 times to look at the fissure pattern. The findings were tabulated and examined. Result: V-type fissure patterns were more common in maxillary mandibular molar teeth (Primary Maxillary 1st Molar: 53.3%; Primary Maxillary 2nd Molar: 60%); U-type fissure patterns were more common in mandibular primary teeth (Primary Mandibular 1st Molar: 60%; Primary Mandibular 2nd Molar: 66.6%). Conclusion: Compared to other fissure patterns, the U and V types of fissure patterns were more common in the primary molars.