A polymer complex having two or more kinds of channel groups through which specific compounds ranging from gaseous small molecules to large molecules such as proteins and other biomolecules can be selectively incorporated and/or released and/or transported is provided. The polymer complex includes an aromatic compound ligand, a central metal ion, and an uncoordinating aromatic compound. In the polymer complex, the uncoordinating aromatic compound is intercalated between aromatic compound ligands in a three-dimensional coordination network. Each of two or more kinds of channel groups contains channels identical with one another and having inherent affinity for guest components. The uncoordinating aromatic compound has a specific substituent A at a specific position on the aromatic ring thereof, and the uncoordinating aromatic compound is arranged regularly such that the substituent A is directed to the inside of a specific channel group B out of the two or more kinds of channel groups.