The complex cation of the title compound, bis[bis(2-aminoethyl)aminoacetato] -di-mu-hydroxo-dicobalt(III), [Co-2(C6H14N3O2)(2)(mu-OH)(2)](ClO4)(2), has a dinuclear structure, with two OH bridges, Each Co atom is octahedrally surrounded by a bis(2-aminoethyl)aminoacetate tripodal structure and two OH groups. In the crystal structure, intermolecular O-H ... O hydrogen bonds form infinite chains of molecules, which significantly stabilizes the dinuclear structure; the Co ... Co distance is 2.863(1) Angstrom.