Background: Colonoscopy is a necessary and widely usedprocedure that has vital role in early detection of colonic and rectal carcinoma and is an essential test in the diagnosis of many diseases of the lower gastrointestinal tract. Colonoscopy is still the investigation of choice for visualizing colonic and rectal mucosa for diseases such as carcinoma, adenoma, and inflammatory conditions. Objectives: Is to make quality assessment of colonoscopy procedures conducted at AlDiwaniyah Gastroenterology Center and compare the results with the international figures. Patients and Method:This is a retrospective observational study conducted at AlDiwaniyah Gastroenterology Center involved patients underwent colonoscopy for the period of one year, from February 2018 till January 2019. The number of Patients included are 303, (153 males and 150 females) ranging in age from 3 to 85 years underwent colonoscopy for different indications and the results analyzed regarding the level of colonic intubation, quality of colonic preparation and the related factors. Results:In 96 patients(22.77%)the procedure was limited to the splenic flexure and only the Rectum& Left colon intubated; in 50 patients(16.50%) the procedure terminated at Hepatic Flexure; Cecal intubationachieved in 157 patients representing (51.81%) of the examined patients; and Terminal Ilium intubation was done in 93 patients (30.69%);Only 30 patients (9.90%) found to be perfectly prepared, 103 (33.99%) had poor preparation and the majority ( 17o patients representing 56.11%) had acceptable level of preparation;those in which cecal intubation not done include: those who have no indications for complete intubation (86 patients 58.90%); poorly prepeared patients (45patients 30.82%); Irritable not well sedated patients (9 patients 6.16%) and finally those who had technical problem prohibiting cecal intubation such as bowel stricture or obstructive mass lesion (6 patients 4.12%). Conclusions: Colonoscopy at al-Diwaniyah Gastroenterology center is providing a valuable & a good quality service to the province population, yet the competence of the endoscopy staff measured by cecal andIlial intubation ratesis still below the international figures and it needs to be improved by providing the center by a highly qualified personnel and equipment.