PROBLEM TO BE SOLVED: To provide a novel thrombus preventing composition.SOLUTION: The thrombus preventing composition is provided that includes rice bran enzyme-treated material.SELECTED DRAWING: Figure 1【課題】新規な血栓予防用組成物を提供する。【解決手段】米糠酵素処理物を含む、血栓予防用組成物。【選択図】図1