A substrate for a liquid crystal display device comprises a TFT substrate for holding opposing substrates arranged opposed to each other as well as a liquid crystal composition obtained by mixing a monomer into liquid crystals. A plurality of bus lines are formed on the TFT substrate intersecting each other through an insulating film, and thin-film transistors are formed close to positions where the plurality of bus lines and intersect each other. A plurality of thin-film transistors for polymerization are formed for applying a voltage to the pixel electrodes at the time of polymerizing the monomer, and a first common electrode wiring for polymerization is electrically connected to the gate electrodes of the plurality of thin-film transistors for polymerization.