Juvenile polyposis is an uncommon condition characterized by the development of multiple juvenile polyps predominantly in the colon but also in the rest of the gastrointestinal tract. Patients with juvenile polyposis commonly present with rectal bleeding, diarrhea, abdominal pain, anemia, prolapse of the polyp. We experienced a juvenile polyposis in a 7 year-old male patient with protein losing enteropathy who was diagnosed by ^99MTc-human serum albumin abdominal scintigraphy, colonoscopy, and small bowel series. Proctocolectomy with ileostomy was performed and then protein losing enteropathy was resolved.