In this letter it is demonstrated that a cholesteric liquid crystal cell placed between two liquid crystal quarter-waveplates functions as a linear polarizer. In this experiment, the liquid crystal linear polarizer constructed yielded an extinction ratio of 205: 1 which can be improved more by using glass plates of better optical quality for cell substrates. Liquid crystal linear polarizers are expected to be used as large aperture polarizing elements for Faraday optical isolators in a high-power laser system.