Abstract: The present invention discloses a plasma reflective polarizer, which comprises a transparent substrate and a metal-line film. The metal-line film is formed via periodically disposing metal lines on the transparent substrate. Alternatively, the plasma reflective polarizer of the present invention comprises a plurality of transparent substrates stacked one above one; each transparent substrate has a metal-line film, and the metal-line film is formed via periodically disposing metal lines on the transparent substrate. The plasma reflective polarizer of the present invention is a simple structure formed of only a common transparent substrate and a metal-line film. Therefore, the present invention is a low-cost plasma reflective polarizer having a high brightness-enhancing function and superior mechanical properties.