The Cu-II ion in the title compound, [Cu(C9H24N4)- (ClO4)(2)], is six-coordinate in a distorted square-bipyramidal environment; four tetraamine N atoms are equatorial and two O atoms, one from each perchlorate ion, are axial. The quadridentate ligand is in its stable planar conformation with the central six-membered chelate ring in a chair form and both terminal five-membered rings in gauche forms. The four chiral N-atom centres have configurations 2RS, 5SR, 9RS and 12RS.