Free blood clot capture device

The present invention, by inhibiting the blood coagulation reaction in stage coagulation thrombus formation stage and blood coagulation factors of the primary hemostatic platelet involvement is involved, the released thrombi reliably captured, and the available time and its object is to provide a free thrombus capture device that makes it possible to extend. The present invention is free thrombus capture instrument the compound is immobilized on the surface with antithrombin ability and capture method of free thrombus comprising capturing free thrombi in the blood in vivo at the free thrombus capture device provide.