A 24-year-old woman came to the emergency room with a history of diffuse abdominal pain in the form of colic, nausea, vomiting and intestinal constipation. Clinical and ultrasound findings suggested intestinal obstruction due to foreign body. She had been submitted to a cesarean section 4 months previously at another hospital. At laparotomy, a ileum loop was found to be distended by an inside large and hardened mass with another intestinal loops and omentum density adherent. An ileotomy was performed on the compromised segment with terminating anastomosis. When opened surgical specimen it was observed an intraluminal surgical sponge that had completely migrated into the interior of the ileum and stopped next to ileumcecal valve. No fistulas or open intestinal wall were observed.