Composite nanotubes of poly(methyl methacrylate) and a discotic liquid crystalline material have fabricated on an ordered porous anodic alumina template. The nanotubes formed by the template have a diameter distribution from 150 similar to 200 nm and the thickness of the walls of the nanotube is 20 similar to 30 nm. The x-ray diffraction studies showed that the discotic liquid crystalline material formed oriented column in the nanotubes due to spatial confinement. The results showed that the geometric confinement can promote the columnar growth of the discotic liquid crystalline molecules along the long axes of the nanotube.