Shear wave velocity and its attenuation in Wood's alloy were measured from room temperature to melting range. The present data are combined with those for dilatational wave, and the variations of elastic and anelastic properties during the melting process were analyzed. Although the shear wave vanished at the early stage of melting process, the rigidity was supposed to decrease continuously to zero at the end of total melting. The variations of the other quantities associated with melting were discussed based on the present data.