Several newly synthesized comb-polymers with fluorocarbon side-chains have been found to form stable monolayers on the water surface, which could be deposited on solid substrates as the Z-films. Friction behavior of the Z-films measured by atomic force microscopy has been clearly affected by the atom (-F/-H) of ends of the fluorocarbon chains exposed in the outermost layers of the polymer as well as those of the corresponding monomer Z-films.