Infantile hypertrophic pyloric stenosis is a common conditio affecting young infants, despite its frequency, it has been recognized only for a little over a century, and its etiology remains unknown. The lesion is characterized by gastric outlet obstruction and multiple anatomic abnormalities of the pyloric antrum. The antropyloric muscle is abnormally thickened and innervated, and the intervening lumen is obstructed by crowded and redundant mucosa. I will present a case of persistence of vomiting and becoming forceful which was diagnosed to have infantile pyloric stenosis with the aid of radiologic and sonographic evaluation. Due to early diagnosis appropriate intervention was done which prevented serious complication and could result to the patient`s demise.