In heat-sensitive recording material comprising a single layer or multiple layers with heat-sensitive recording layer containing at least an electron donating colorless or light-colored on the support leuco dye and electron accepting color developing agent, at least one layer on the support , hydrated silicate compounds deposition step of neutralizing the mineral acid and acid metal salts aqueous sodium silicate solution, by the inclusion of hydrated silica was subjected to wet pulverization treatment, excellent color developing sensitivity, the coating layer strength, Furthermore, to obtain resistance to head wear resistance, dregs adhesion, a high sensitive recording with excellent whiteness sticking resistance.