PURPOSE: A composition containing rice bran extract for preventing or treating diabetes is provided to enhance blood glucose reduction and to be combined with other agent for treating or preventing diabetes.CONSTITUTION: A composition for preventing or treating diabetes contains rice bran extract. The composition is a pharmaceutical composition or food composition. The extract is prepared using 70% or more ethanol. A composition for preventing or treating diabetes complication contains the rice bran extract as an active ingredient. The diabetes complication includes neuronal complication, diabetic retinopathy, renal failure, sexual dysfunction, dermatitis, hypertension, arteriosclerosis, stroke, heart diseases, and gangrene.COPYRIGHT KIPO 2013본 발명은 왕겨 추출물을 포함하는 당뇨병 치료 또는 예방용 조성물을 개시한다.