Constipation is among the most common causes of referral to pediatrics and pediatric surgery outpatient clinics. Functional causes are often held responsible for the etiology. However, metabolic and anatomical causes are found in 5% of the patients. Major anatomical causes include anorectal malformations such as anal stenosis and vestibular anus. Anorectal malformations are often diagnosed during the neonatal period. We present our case with a rather delayed diagnosis of anorectal malformation.Our patient was a seven-month-old male baby, brought with a complaint of constipation and swelling in his abdomen. An anatomic esophageal anal atresia was detected as a result of the physical examination performed. No additional anomaly was detected in the patient. Surgical treatment was planned and mini- posterior sagittal anorectoplasty was performed.Constipation is common, with differences among societies. Proper diagnosis and treatment can be performed with a careful history and careful physical examination of constipated patients. In particular, the anatomical causes of constipation can only be detected with an anal area examination. Anorectal area examination should therefore be done routinely in all children who have constipation

Keywords: Anal atresia, Anocutaneous fistula, Constipation, Diagnosis