Micro-electromechanical-systems driven wire grid polarizers (MEMS-WGPs) were proposed and fabricated. MEMS-WGPs mainly consisted of an Au cantilever array and two kinds of electrical leads. One lead was connected with cantilevers and the other lead was located under the cantilevers. Because the cantilevers were electrostatically actuated downward by applying voltage between the two leads and made contact with the next cantilever, transmittance could be changed. Static wire grid polarizers were also fabricated and measured their optical characteristics in THz region, as preliminary step toward MEMS-WGPs. MEMS-WGP was successfully fabricated and the cantilever array was electrostatically actuated. In THz region, transmittance of the fabricated MEMS-WGP was changed from 14.7% to 10.6% on average by applied voltage of 200V.