The title compound, [Cu₂(ClO₄)(C₁₄H₁₃N₂O)₂(H₂O)]ClO₄, crystallizes as an unsymmetrical dinuclear cation bridged by the phenoxy O atoms with one Cu^IIatom coordinated by a water molecule and the other by a perchlorate anion, thus making both Cu^IIatoms five-coordinate, and with a further perchlorate anion present for charge balance. A long interaction [2.9893 (5) Å] between one of the two Cu^IIatoms and an O atom of the perchlorate counter-ion links the cations and anions into linear chains along thea-axis direction. In addition, the water H atoms link with the perchlorate counter-ion. These interactions, along with numerous C—H...O interactions between the tetrahedral perchlorate anions, link the ions into a complex three-dimensional array. One of the perchlorate anions is disordered over two conformations with occupancies of 0.586 (4) and 0.414 (4).