Aim: In this study, it was aimed to evaluate presenting symptoms, indications for colonoscopy, results and complications in pediatric patients undergoing colonoscopy. Method: Patients aged 0-18 years who underwent colonoscopy between January 2008 and December 2020 were included in the study. The demographic characteristics, colonoscopy and pathology results of the patients were analysed retrospectively. Results: The mean age of 489 patients was 12.39±4.32 years, 57.4% were male, 42.6% female. 408 patients had at least one symptom. The most common three symptoms are; rectal bleeding (n=265,54.1%), abdominal pain (n=187,38.2%) and bloody mucus in stool (n=112,22.9%). Main indications for colonoscopy were suspected inflammatory bowel disease (IBD) (n=212,43.3%), lower gastrointestinal bleeding (n=145,29.6%) and chronic diarrhea (n=59,12%). The two most common diagnoses were IBD (n=88,17.9%) and polyp (n=31,6.3%). Of those with IBD, 46(9.4%) had ulcerative colitis, 32(6.5%) had Crohn's disease and 11(2.2%) had undetermined IBD. Polyps were most frequently located (74.1%) in rectosigmoid colon, 61.2% of them were juvenile polyps. In 272 (55.6%) patients with normal results, the two most common symptoms were rectal bleeding (n=91,62.7%) and diarrhea (n=31,52.5%), the most common finding was anemia (n=25,59.5%). Colonoscopy results were normal in 30.6% of patients presenting with abdominal pain if there were with additional symptoms and 62.9% with no additional symptoms (p=0.032). Spontaneous perforation was observed in two patients (0.04%). Conclusion: Colonoscopy is a reliable method when performed with correct indication. Presence of additional symptoms should be investigated, especially in patients with abdominal pain. The most common disease in our study was IBD and it is predicted that its frequency will increase, but multicenter epidemiological studies are needed for more accurate results.