The gastrointestinal tract perforation by an ingested fish bone is unusual, and the preoperative diagnosis is extremely difficult. Herein, we report a 66 year old woman who had a sudden onset of vomiting with abdominal cramping pain, especially localized at right lower quadrant after a meal. Computed tomography of the abdomen revealed a foreign body in the terminal ileum with impended intestinal perforation and localized peritonitis. She had immediate surgical intervention and a bony chip foreign body was removed from colon, partial colectomy with anastomosis was done successfully. This patient's clinical course was smooth and she was discharged back home in good condition. An early accurate diagnosis and rapid emergency surgical intervention may have greatly aided in the good results in this case.