Hollow Cu nano/microstructures are prepared by reduction Of CuSO4 center dot 5H(2)O with glucose by using a mild hydrothermal process. The X-ray powder diffraction and energy-dispersive X-ray analysis indicate that the products are pure Cu and of cubic phase. The morphology of the products can be controlled between nanotubes and microspheres assembled from hollow nanoparticles by adjusting the concentration of sodium dodecyl sulfate. A series of experiments confirm that the concentration of the glucose and NaOH also play important roles in the formation of the hollow Cu nano/microstructures.