As novel molecule-based magnetic materials based on metal coordination polymers bridged by bim(2-),(Ni-cyclam)(2)(bim)](ClO4)(2) ((1) under bar) (bim(2-) = dideprotonated 2,2’-biimidazolate dianion) was synthesized and the crystal structure was characterized by X-ray crystal analysis. (Crystal data : orthorhombic, Pbca (No. 61), a = 16.677(2) Angstrom, b = 16.447(5) Angstrom, c = 13.212(1) Angstrom, V = 3623(1) Angstrom(3), Z = 4) The magnetic susceptibility measurements of the dinuclear nickel (II) complex (1) in the crystalline state showed the weak antiferromagnetic property (J = -4.6 cm(-1)), which was also sujested by the ESR mesurements.