Abstract: An element-locating device for pure water maker which includes a water reservoir, three filters, a reverse osmotic membrane tube, a pump, a transformer and a board body on which the pump and the transformer are disposed. The above elements are disposed in the locating device including a box body having a rectangular cross-section and clamps respectively disposed on four corners of the box body. Each clamp includes two symmetrical first clamping portions and two symmetrical second clamping portions. The first clamping portions of the clamps abut against the water reservoir and the second clamping portions of the clamps abut against the filters or the reverse osmotic membrane tube respectively.