PROBLEM TO BE SOLVED: To provide: a novel porous polymer metal complex and a gas absorbent having excellent properties using the same; and a gas separation device and a gas storage device each configured by housing the gas absorbent having the properties inside.SOLUTION: There is provided the novel porous polymer metal complex represented by a formula (1)[MXY](1), (in the formula,M is a bivalent transition metal ion, X is an aromatic ligand containing at least one or more perfluoroalkyl group having 1 to 10 carbon atoms and 2 carboxyl groups, Y is a bipyridyl type second ligand, q is 0 or 1, n represents such a property that a lot of constituent units consisting of [MXY]is aggregated, and the size of n is not specifically limited), the metal ion having a laminate type network structure of a two-dimensional square grate in which the 4 ligands are coordinated. There are also provided use of the novel porous polymer metal complex as the gas adsorbent, the gas separation device and the gas storage device each usi
