A one-component type curable composition comprising, as components, (A) a polyoxyalkylene polymer (a1) having a silicon-containing group being capable of crosslinking by forming siloxane bonds and/or a (meth)acrylate polymer (a2) having a silicon-containing group being capable of crosslinking by forming siloxane bonds, (B) a chelate type methyl titanate (b1) represented by the general formula : wherein each of (4-n) R 1 s is independently hydrogen atom or a substituted or unsubstituted hydrocarbon group having 1 to 20 carbon atoms, each of (4-n) A 1 s and (4-n) A 2 s is independently -R 2 or -OR 2 where R 2 is a substituted or unsubstituted hydrocarbon group having 1 to 20 carbon atoms, n is 1, 2 or 3, and/or a chelate type ethyl titanate (b2) represented by the general formula : wherein R 1 , A 1 , A 2 and n are the same as defined above, and (C) a compound having, in its molecule, a hydrolyzable silicon group and a nitrogen-substituted group represented by the general formula : -NHR 3 wherein R 3 is hydrogen atom or a substituted or unsubstituted hydrocarbon group having 1 to 20 carbon atoms, wherein said silicon-containing group contained in the component (A) is represented by the following general formula : -SiR 5 3-a (OR 6 ) a wherein R 5 is a substituted or unsubstituted hydrocarbon group having 1 to 20 carbon atoms or a triorganosiloxy group represented by (R') 3 SiO- where each of R's is independently a substituted or unsubstituted hydrocarbon group having 1 to 20 carbon atoms, R 6 is an alkyl group having 1 to 4 carbon atoms, a is 1, 2 or 3, and said hydrolyzable silicon group contained in the component (C) is a trimethoxysilyl group. (A) a polyoxyalkylene polymer (a1) having a silicon-containing group being capable of crosslinking by forming siloxane bonds and/or a (meth)acrylate polymer (a2) having a silicon-containing group being capable of crosslinking by forming siloxane bonds, (B) a chelate type methyl titanate (b1) represented by the general formula : wherein each of (4-n) R 1 s is independently hydrogen atom or a substituted or unsubstituted hydrocarbon group having 1 to 20 carbon atoms, each of (4-n) A 1 s and (4-n) A 2 s is independently -R 2 or -OR 2 where R 2 is a substituted or unsubstituted hydrocarbon group having 1 to 20 carbon atoms, n is 1, 2 or 3, and/or a chelate type ethyl titanate (b2) represented by the general formula : wherein R 1 , A 1 , A 2 and n are the same as defined above, and (C) a compound having, in its molecule, a hydrolyzable silicon group and a nitrogen-substituted group represented by the general formula : -NHR 3 wherein R 3 is hydrogen atom or a substituted or unsubstituted hydrocarbon group having 1 to 20 carbon atoms, wherein said silicon-containing group contained in the component (A) is represented by the following general formula : -SiR 5 3-a (OR 6 ) a wherein R 5 is a substituted or unsubstituted hydrocarbon group having 1 to 20 carbon atoms or a triorganosiloxy group represented by (R') 3 SiO- where each of R's is independently a substituted or unsubstituted hydrocarbon group having 1 to 20 carbon atoms, R 6 is an alkyl group having 1 to 4 carbon atoms, a is 1, 2 or 3, and said hydrolyzable silicon group contained in the component (C) is a trimethoxysilyl group. <EOS>