An objective of the present disclosure is to provide an adsorption material that can selectively adsorb immunosuppressive leukocyte. The present disclosure provides an adsorption material for immunosuppressive leukocyte. The adsorption material includes a water-insoluble carrier to which at least one nitrogen-containing compound selected from a polyamine represented by a predetermined formula and aliphatic amines represented by predetermined formulae are bound. A form of the water-insoluble carrier is a fiber or a particle, a diameter of the fiber or the particle is 15 to 50 μm, and an arithmetic mean roughness of a surface of the water-insoluble carrier is 0.1 to 3.0 μm.
