Human immunodeficiency virus (HIV) infection is a risk factor for developing non-Hodgkin's lymphoma. Most acquired immune deficiency syndrome (AIDS)-related lymphomas are high-grade B cell non-Hodgkin's lymphomas. The use of highly active antiretroviral therapy has reduced the incidence of AIDS-related lymphoma. There have been 7 reports of AIDS-related extra-nodal lymphoma in Korea. We report a case of AIDS-related lymphoma detected by MiroCam capsule endoscopy.