A novel hybrid manganese phosphate, [（bipy）Mn（H2PO4）2] （bipy = 2,2＇-bipyridine） 1, was synthesized, and its structure is characteristic of i-D framework involving a dinuclear structure made up of edge-sharing Mn（Ⅱ） octahedra. 1 crystallizes in the monoclinic system, space group C2/c with a = 12.230（2）, b = 17.800（4）, c = 13.530（3） A°, β = 105.00（3）°, V= 2845.0（10） A°^3, Z = 8. Dc = 1.892 g/cm^3, F（000） = 1640, Mr = 405.10,μ（MoKα） = 1.198 mm^-1, R = 0.0306 and wR = 0.0657 for 2093 observed reflections （I 〉 2σ（I））.
