Abstract: A surface-modified plastic plate for use in optical disc bases, windows of aircrafts, automobiles or of architectural structures, solar cell receptors, liquid crystal display panels and protective sheet of computer touch panels, which comprises a laminate consisting of a plastic substrate; a cured film of an actinic ray-curable primer composition, said cured film formed onto a surface of the plastic substrate in a film thickness of 0.1 to 10 .mu.m; and an inorganic material layer formed onto the cured film by a physical deposition process and having a thickness of 0.1 .mu.m or more but less than 1.0 .mu.