W-boson electric-dipole moment in a two-Higgs-doublet standard model

We analyse in detail the e.d.m.dW of W-boson in a two-Higgs-doublet standard model. It results almost independent of many parameters of the model, in particular of tg β, the ratio between the absolute v.e.v.'s of Higgs doublet fields, but for tg β≲2.5. For top-quark mass lighter than (200÷250) GeV,dW remains within the present upper bound of 10−20e-cm, even if the relative ξ-phase of the v.e.v.'s is maximallyCP violating.