WE CLAIM:
[Claim 1]
An adsorption material for immunosuppressive leukocyte, the adsorption material comprising
a water-insoluble carrier to which at least one nitrogen-containing compound is bound, the nitrogen-containing compound being selected from a polyamine represented by following Formula (1), a primary aliphatic amine represented by following Formula (2), and a secondary aliphatic amine represented by Formula (3),
wherein the water-insoluble carrier has a form of fiber or particle, the fiber or the particle has a diameter of 15 to 50 um, and the water-insoluble carrier has a surface with an arithmetic mean roughness of 0.1 to 3.0 um:
R1R2N-X-NR3R4 … Formula (1)
in Formula (1), X is a saturated or unsaturated aliphatic hydrocarbon group having 2 to 20 carbon atoms, or a heteroatom-containing carbon chain in which 1 to 5 carbon atoms of a saturated or unsaturated aliphatic hydrocarbon group having 3 to 20 carbon atoms are replaced with a nitrogen atom, a hydrogen atom that bonds to the nitrogen atom may be replaced with an alkyl group that may have an amino group, and R1 to R4 are each independently a hydrogen atom or an alkyl group;
NH2R5 … Formula (2)
in Formula (2), R5 is a saturated or unsaturated aliphatic hydrocarbon group having 1 to 12 carbon atoms;
NHR6R7 … Formula (3)
in Formula (3), R6 and R7 are each independently a saturated or unsaturated aliphatic hydrocarbon group having 1 to 12 carbon atoms.
[Claim 2]

The adsorption material according to claim 1,
wherein the nitrogen-containing compound comprises the polyamine represented by the Formula (1).
[Claim 3]
The adsorption material according to claim 1 or 2,
wherein the nitrogen-containing compound binds to the water-insoluble carrier via a linker.
[Claim 4]
The adsorption material according to any one of claims 1 to 3, wherein the water-insoluble carrier has a form of fiber.
[Claim 5]
The adsorption material according to any one of claims 1 to 4,
wherein the immunosuppressive leukocyte is a LAP positive lymphocyte
or a LAP positive monocyte.
[Claim 6]
An adsorption column comprising the adsorption material according to any one of claims 1 to 5.
[Claim 7]
The adsorption column according to claim 6,
wherein the adsorption column is used for a blood purification therapy.