The small intestine has always been a problematic segments for endoscopic exploration in patients with obscure gastrointestinal bleeding. Recent emergence of capsule endoscopy has entailed a relevant diagnostic imaging advance for gastrointestinal conditions. Capsule endoscope can be used to detect small bowel bleeding. Some studies report that capsule endoscopy has the high diagnostic yield and is superior to enteroscopy and other diagnostic methods. We report here the first case of small bowel bleeding detected by using capsule endoscope in Korea, in a woman with hematochezia and a history of aspirin ingestion. (Korean J Gastrointest Endosc 2003;27:545548)