Heat-sensitive recording material

A heat-sensitive recording material comprising:

• an undercoat layer formed on one surface of a support;
• and
• a heat-sensitive recording layer formed on the undercoat layer, wherein
• the heat-sensitive recording layer contains a leuco dye and a coloring agent,
• the undercoat layer contains hollow particles and a binding resin,
• a maximum particle diameter of the hollow particles is 10 to 30 μm,
• a particle diameter of the hollow particles at cumulative 50 volume % is 4.0 to 15 μm,
• a ratio D100/D50 is 1.8 to 3.0, D100 representing the maximum particle diameter of the hollow particles, and D50 representing the particle diameter of the hollow particles at cumulative 50 volume %,
• a volume percentage of the hollow particles having particle diameters of 2.0 μm or less is 1% or less, and
• a content of the hollow particles with respect to a total solids content of the undercoat layer is 5 to 40 mass %.