In this research we have studied the scratch behaviour of coatings of organicx2013;inorganic hybrid materials prepared by solx2013;gel processing, using as precursors, trialkoxysilanes with organic functionalities that react via free radical polymerization. We have also evaluated the influence of pure inorganic precursor as tetralkoxysilanes or pure organic precursors on the scratch behaviour. The main goal of this research was to evaluate how the chemical structure of the organicx2013;inorganic hybrid influences the scratch behaviour of the coatings.