A type zeolitic crystal film was synthesized on porous supports from the reaction mixture of 1.9 SiO₂-1.5 Na₂O-Al₂O₃-40 H₂O. The zeolite film was characterized by XRD and SEM. The crystals grown on the porous matrix were very closely bound together and the thickness of membrane was about 8-15㎛. The densely intergrown crystals could be also synthesized by the hydrothermal treatment at 100℃ after pressing the reaction mixture without addition of water. A zeolite membrane crystallized as a thin film showed the selective permeability of water from water and methanol mixture through the molecular sieving activity of micropores.