PROBLEM TO BE SOLVED: To provide contrast mediums for preventing contrast nephropathy, and to provide preventive agents for contrast nephropathy.SOLUTION: The invention provides a contrast medium in which an oxygen carrier is administered before or at the same time of the administration of the contrast medium and a preventive agent for contrast nephropathy containing physiological salt solution and an oxygen carrier.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】造影剤腎症を予防するための造影剤および造影剤腎症予防剤を提供する。【解決手段】造影剤を投与する前または投与と同時に酸素運搬体を投与することを特徴とする造影剤、および生理食塩水と酸素運搬体とを含有する造影剤腎症予防剤。【選択図】なし