Abstract: A filter for processing blood that comprises a flexible container having an inlet and an outlet for blood, and a sheet-like blood processing filter material situated in such a manner so as to partition the inside of the container into an inlet side and an outlet side, wherein the flexible container comprises a container body which houses the blood processing filter material and an outlet port that forms the outlet, and the outlet port has a protrusion that protrudes from the container body into the inside of the container body, the protrusion having a plurality of fluid channel inlets formed at locations that are not in contact with the blood processing filter material.

Abstract: This invention provides a blood processing filter including a flexible container having an inlet and an outlet for blood, and a sheet-like filter member arranged so as to divide the inside of the flexible container into one side and another side. An annular seal part is formed at which an entire circumference that is adjacent to a peripheral portion of the filter member is integrally sealed to the flexible container. The blood processing filter is retained in a curved shape that curves as viewed from a predetermined one direction that is orthogonal to the thickness direction by the rigidity of the seal part.

Abstract: A filter for processing blood that comprises a flexible container having an inlet and an outlet for blood, and a sheet-like blood processing filter material situated in such a manner so as to partition the inside of the container into an inlet side and an outlet side, wherein the flexible container comprises a container body which houses the blood processing filter material and an outlet port that forms the outlet, and the outlet port has a protrusion that protrudes from the container body into the inside of the container body, the protrusion having a plurality of fluid channel inlets formed at locations that are not in contact with the blood processing filter material.