To provide a simple antithrombogenicity evaluation method of an antithrombogenic material.SOLUTION: There is provided an antithrombogenicity evaluation method of an antithrombogenic material, having a process (1) for flowing blood to an antithrombogenic material layer surface of an antithrombogenic member having a substrate and an antithrombogenic material layer consisting of the antithrombogenic material formed on the substrate; a process (2) for removing the blood from the antithrombogenic material layer surface; and a process (3) for contacting blood containing a blood coagulator with the antithrombogenic material layer surface.SELECTED DRAWING: Figure 1【課題】抗血栓性材料の簡便な抗血栓性評価方法を提供することを目的とする。【解決手段】抗血栓性材料の抗血栓性評価方法であって、基材と、前記基材上に形成された前記抗血栓性材料からなる抗血栓性材料層と、を有する抗血栓性部材の、前記抗血栓性材料層表面に血液を流通させる工程(1);前記抗血栓性材料層表面から前記血液を除去する工程(2);及び前記抗血栓性材料層表面に、血液凝固剤を含む血液を接触させる工程(3);を有する抗血栓性評価方法。【選択図】図1