A method for manufacturing a chemically bonding material composed of a compound expressed by a general formula ABX.sub.n (Formula 1), wherein A indicates a group including carbon, B indicates Si, Ge, Sn, Ti or Zr, X is a hydrolyzable groupand n indicates 1, 2 or 3, and at least two kinds of compounds not including active hydrogen groups, wherein at least the two kinds of compounds not including ac