The title compound, [Pd(2,2'-bipy)(2)](H(3)adiP)(2 center dot)4H(2)O, was synthesized via the hydrothermal reaction of PdCl2 with 5-aminodiaceti,c isophthalic acid (H(4)adip) in an acetic acid water solution. It was characterized by elemental analysis and infrared spectrum. Crystal data for C44H44N6O20Pd: monoclinic, space group P2(1)/n, a = 11.0674(2), b = 9.9716(2), c = 20.5770(3) A, beta = 92.7300(3)degrees, V = 2268.29(7) angstrom(3), Z = 2, M-r = 1083.25, D-c = 1.586 g/cm(3), F(000) = 1112, mu = 0.499 mm(-1), lambda(MoK alpha) = 0.71073 angstrom, T = 293(2) K, 2 theta(max) = 51.38', GOOF = 1.067, R = 0.0268 and wR = 0.0710 for 3770 reflections with I > 2 sigma(I). X-ray diffraction studies reveal that the title compound has an interesting 3D microporous architecture via hydrogen bonds with the cations located inside the channel.