<p>Disclosed is a heat-sensitive recording medium which has excellent storage stability (plasticizer resistance and heat resistance) in an image portion even in severe environments. The heat-sensitive recording medium has a structure wherein a heat-sensitive color-developing layer containing a colorless or pale-colored dye and two kinds of developers is formed on a supporting body. The heat-sensitive color-developing layer contains bis(3-allyl-4-hydroxyphenyl)sulfone and a phenol novolac compound as the developers.</p>
