This paper discusses the topographic effects on magnetotelluric response. The authors hcre calculated several magnetotelluric response curves on different topography with finite e ement method, using quadratic triangular element. In the case of E_x-polarization, the effects occur only on the frequency band in which the length of wave propagated under ground is comparable with the amplitude of undulation of topography. In the case of H_x-polarization, the topographic effects are severer than that in E_x-polarization, and it becomes stable as the period increases. The effects are severer on convex place than on concave place. More