Back ground:- Bleeding per rectum is a common universal emergency in clinical practice and remain a major medical problem??????. Objectives:- To diagnose the causes of bleeding per rectum?????.. Patients & Methods:-This is a prospective study of 100 patients referred to the gastrointestinal endoscopic unit at Al-yarmouk Teaching Hospital from July 2016 to July 2017????..?????????????. Results:-Seventy patients were males (70%) &30 patients were females (40%) & male to female ratio were 2.33:1. The age ranged from 21 to 80 years, with mean age of the patients was 31 years + 5 years. The majority being in the 5th decade of life constituting about 25 patient (25%). The commonest cause of the bleeding were heamorrhoid 30 patients (30%), and the next cause were ulcerative colitis 20 patients (20%), followed by benign colonic adenomatouspolyp15 patients (15%), benign rectal adenomatous polyp 11 patients (11%), solitary benign rectal ulcer 10 patients (10%), colonic cancer7 patients (7%), rectal cancer 4 patients (4%) and infective colitis 3 patients (3%)????????????... Conclusion:- Our study showed that the most common cause of bleeding were Haemorrhoid, ulcerative colitis, colonic benign adenomatous polyp, rectal benign adenomatous polyp, solitary rectal ulcer, colonic cancer, rectal cancer and infective colitis???????????????...