To provide a blood compatible material which achieves the excellent dynamic characteristic and higher transparency by arranging an antithrombotic material to be contained into a polymer gel having a 3D mesh formed by the compounding of a polymer of a water-soluble organic monomer and a clay mineral in the water or turning at least the surface part of the polymer gel hydrophobic.

In the blood compatible material, the antithrombotic substance is contained in the polymer gel in which the 3D mesh is formed by the polymer of a water-soluble organic monomer and a clay mineral.