In the title complex, [Cu(CH(3)COO)Cl(C(16)H(14)N(4))]·H(2)O, the Cu(II) ion is five-coordinated by two N atoms from a 2,2'-(ethane-1,2-di-yl)di-1H-benzimidazole ligand, two O atoms from a chelating acetate ligand and one terminal monodentate Cl atom in a distorted square-pyramidal geometry. In the crystal, adjacent mol-ecules are linked through O-H⋯Cl, N-H⋯Cl, N-H⋯O and O-H⋯O hydrogen bonds into a three-dimensional network.