The present invention provides a copolymer or the like obtained by polymerizing a monomer mixture including at least compounds represented by formulas (A), (B), and (C) (in the formulas, Ta, Tb, Tc, Ua1, Ua2, Ub1, Ub2, Ub3, Qa, Qb, Qc, Ra, Rb, Rc, An-, and m are as defined in the description and claims). The copolymer of the present invention can be utilized as an ion complex material having an exceptional ability to inhibit adhesion of biological materials.本發明提供共聚物等，其係藉由使至少包含以下述式(A)、(B)及(C)(式中，Ta、Tb、Tc、Ua1、Ua2、Ub1、Ub2及Ub3、Qa、Qb及Qc、Ra、Rb及Rc、An-以及m係如本說明書及發明申請專利範圍中定義)表示的化合物之單體混合物聚合而得。本發明之共聚物係可利用作為抑制生物物質附著能力優異之離子複合材料。
