The effect of non-circularity of the plasma cross-section on the lower hybrid wave heating (LHWH) is studied by assuming reasonable profiles of the plasma parameters which are consistent with the magnetic flux function obtained by the theory of MHD equilibrium. It is found that, in a tokamak with a non-circular cross-section, the lower hybrid wave can penetrate into the plasma core in the same way as in a conventional tokamak. The absorption regions are in the case of an elliptic cross-section, localized near the midplane. A new function of the poloidal divertor, i.e. the reduction of surface waves with unfavourable effects on LHWH is discussed.