The determination of the dynamic shear modulus ‘G’ of soils, accounting for the various parameters affecting its value, has assumed a special significance in recent years in view of the advancements in the techniques for analysing dynamic soil-structure interaction problems. Needless to say, the predicted response of the system will only be as depend- able as the precision with which the value of ‘G’ has been evaluated. The process of evaluation of the dynamic shear modulus is however quite complicated because of its dependence on a large number of different parameters. Laboratory tests such as Resonance column tests, Dynamic Triaxial tests or oscillatory shear tests and field tests such as Block vibration tests, wave propagation tests, Cyclic plate load tests and Dynamic load bearing tests on footings have been suggested for the determination of the value of dynamic shear modulus by various investigators Drnevich, Hall & Richart (1967), Whitman (1970), Praksh et al. (1973), Arya et al. (1975). It is generally observed that the values obtained by different methods differ widely, Cunny and Fry (1973), and the order of difference may range upto several hundred percent. This is essentially because of the fact that the dynamic shear modulus is affected by factors such as effective confining pressure, strain amplitude, void ratio, degree of saturation, soil structure and time effects and these parameters differ in the different methods used for evaluation of ‘G’. Factors such as void ratio, time effects, soil structure and degree of saturation may be assumed to be fairly constant for a given location. And the largest effect, on ‘G’ values will therefore be exerted by the confining pressure and strain amplitude. Since these conditions differ from test to test, the values of ‘G’ are accordingly affected. In selecting the value of ‘G’ from laboratory or in-situ tests, due consideration should be given to the conditions of confinement and strain associated with the test conducted andthose occurring in the prototype whose response is being predicted. An approach taking care of these factors is therefore necessary.