Purpose: Chronic abdominal pain is a common complaint encountered in pediatric clinics. This study aimed to investigate chronic functional abdominal pain in Korean children and adolescents by applying the Rome III criteria. Methods: A prospective study on chronic abdominal pain in 194 patients was conducted between July 2006 and August 2007. The parents of the subjects were asked to respond to a questionnaire based on the Rome III criteria. These responses were evaluated by pediatricians, and subsequently, the patients were clinically evaluated. Results: On the basis of the results of the medical evaluation, 167 of the 194 patients (86.1%) were diagnosed with functional gastrointestinal disorders, i.e., no organic causes of chronic abdominal pain were detected during the medical evaluation. Of these 167 patients, 89.8% of the patients satisfied one of the Rome III criteria, while 10.2% of the patients did not satisfy any of the Rome III criteria for chronic abdominal pain-related functional gastrointestinal disorders (functional dyspepsia, 29.3%; irritable bowel syndrome, 25.7%; abdominal migraine, 7.8%; childhood functional abdominal pain, 27.0%; and childhood functional abdominal pain syndrome, 12.6%). Compared to other symptom subtypes, children with childhood functional abdominal pain experienced an earlier onset and a shorter duration of symptoms. Conclusion: The Rome III criteria are more comprehensive; the use of these criteria will provide more accurate information and better diagnoses for children and adolescents with chronic abdominal pain.