A material for forming an insulation film comprising an alkoxide compound of lithium and at least one kind of organic solvent selected from ether, ketone, ester, alcohol, and hydrocarbon. A material for forming an insulation film comprising a carboxylate of lithium, an organic solvent, and tetramethoxysilane or tetraethoxysilane. A film-forming method for forming an insulation film with the use of the material for forming an insulation film. An insulation film-forming over the various substrates by spin coating method, mist deposition method or CVD method with the use of these material becomes possible and enables to expect providing an insulation film of high quality and high purity containing lithium or lithium silicate.