In this paper, the law of generation of pore-water pressure in saturated dense sands under uniform cyclic loadings has been studied. Specimens of Cheng-te fine sands with relative density D_r = 0.77 have been tested in a dynamic triaxial apparatus of electromagnetic type under different initial stress states. The experimental results show that under cyclic loadings dense sands also tend to become denser, so the residual pore-water pressure increases as the number of cycles increases, and the relationship between pore-water pressure ratio γ_u and cyclic number ratio γ_N may be expressed by a logarithmic function, whereas the cyclic variation of pore-water pressure about a residual pore pressure curve is approximately close to a sine function with the average amplitude depending on the number of cycles to failure. It also has been found that the residual pore-water pressure at failure is always less than confining pressure σ₃ and is inversely proportional to the ratio of consolidation stresses K_c.