A photo-curable composite material used for preparing various stencils for screen printing, textile printing or the like, which comprises a flat, flexible and photo-transmitting thin film (A); a flat and flexible film (B); a liquid photo-curable resin and a flat screen material, said films (A) and (B) being air-tightly bonded to each other at the peripheral portion thereof to form a flat inner space therein, said liquid resin being filled in said inner space to form a layer and said screen material also being placed in the inner space substantially in parallel with the inner walls of the films (A) and (B).