A method for manufacturing a chemically bonding material comprising the steps of: mixing a compound expressed by a general formula ABX.sub.n (Formula 1), wherein A shows a group including carbon, B indicates Si, Ge, Sn, Ti or Zr, X is a hydrolyzable group and n indicates 1, 2 or 3, and at least one kind of compound not including active hydrogen groups in a dry atmosphere having a water vapor densi