The purpose of the present invention is to provide a foreign matter removal device which is able to efficiently remove foreign matter such as a blood clot present in a living body vessel such as a blood vessel while reducing the leakage of a body fluid such as blood, and a method for removing foreign matter in a living body vessel using the same.A foreign matter removal device (1) is a device for removing foreign matter in a living body vessel, and comprises a long body (10), a rotation body (20) which is provided on the leading end side of the long body (10) and is rotatable with the longitudinal direction thereof as the rotation axis thereof, and a foreign matter trapping member (30). The rotation body (20) is provided with a first opening (21) provided in the surface thereof, a second opening (22) provided in the surface at a position more distant from the rotation axis than the first opening (21), and a flow path having the first opening (21) and the second opening (22) at both ends thereof, and the foreign mater trapping member (30) is configured to be able to trap foreign matter in a flow generated in the flow path (23).Lobjectif de la présente invention est de fournir un dispositif de retrait de corps étrangers qui est apte à retirer efficacement les corps étrangers, tels quun caillot de sang, présents dans un vaisseau dun corps vivant tel quun vaisseau sanguin tout en réduisant la fuite dun fluide corporel tel que le sang, et de fournir un procédé permettant de retirer un corps étranger dans un vaisseau dun corps vivant à laide dudit dispositif. La présente invention concerne par conséquent un dispositif de retrait de corps étrangers (1) qui est un dispositif permettant de retirer un corps étranger dans un vaisseau dun corps vivant, et comprend un corps long (10), un corps de rotation (20) qui est prévu sur le côté dextrémité avant du corps long (10) et peut tourner, sa direction longitudinale lui servant axe de rotation, et un élément de piégeage de corps é
