A method for modifying the surface of a solid substrate, a surface modified solid substrate and an apparatus for modifying a surface of a solid substrate which facilitate adhesion, printing, painting and the like are provided. By providing a method for modifying the surface of a solid substrate, a surface modified solid substrate and an apparatus for modifying a surface of a solid substrate, providing a surface modification apparatus comprising a storage part for storing a fuel gas which comprises a modifying compound which comprises a silicon atom, a titan atom or an aluminum atom, with the respective boiling point being between 10 and 100 DEG C, a transfer part for transferring said fuel gas to an outlet part, and an outlet part for blow treating with a fuel gas flame, and carrying out blow treatment wholly or partly with a silicatizing flame or the like of the surface of a solid substrate.