The present invention provides a heat-sensitive recording material that
comprises a support, a heat-sensitive recording layer comprising a leuco
dye and a developer, and a protective layer principally comprising a
pigment and a binder. The support, the heat-sensitive recording layer,
and the protective layer are provided in this order. The protective layer
comprises: (1) a pigment of secondary particles with an average particle
diameter of 30 to 900 nm formed by aggregation of amorphous silica
primary particles with a particle diameter of 3 to 70 nm; or (2) a
pigment of secondary particles with an average particle diameter of 30 to
900 nm formed by aggregation of amorphous silica primary particles with a
particle diameter of 3 to 70 nm, and a binder comprising acetoacetyl
modified polyvinyl alcohol with a saponification degree of 90 to 100 mol
% and a polymerization degree of 1900 to 5000.