a method of manufacturing a liquid crystal display device capable of easily giving a pre - tilt angle to a homeotropic orientation , the method having the steps of : forming a film of homeotropic orientation material on the surface of a substrate , the material being sensitive to ultraviolet ray and having a property of orientating liquid crystal molecules , on an average , vertically to the surface of the film ; and applying ultraviolet rays to the film of homeotropic orientation material along a direction tilted from the normal to the surface of the film .