A thermal recording sheet having a front surface and a back surface opposite the front surface, comprising: a substrate layer; a recording layer formed on the front surface side of the substrate layer and containing a color developing material that develops color by heating; a protective layer formed on the further front surface side of the recording layer; an intermediate layer on the front surface side of the recording layer and on the back surface side of the protective layer, the intermediate layer being at least partially in contact with the recording layer; and a printed layer formed on the back surface side of the substrate layer, wherein the recording layer contains a first irregular reflection suppression component for suppressing irregular reflection in the substrate layer, the recording layer, the intermediate layer, and the protective layer, the first irregular reflection suppression component is an organic material having a melting point lower than a color developing temperature of the color developing material and has an average particle size of 1 μm or less, the intermediate layer contains a second irregular reflection suppression component for suppressing irregular reflection in the substrate layer, the recording layer, the intermediate layer, and the protective layer, the protective layer contains a binder and a filler, the filler contains colloidal silica, and in a state before the recording layer develops color, the substrate layer, the recording layer, the intermediate layer, and the protective layer are transparent, the second irregular reflection suppression component is a core shell-type particle containing a hydrophilic resin or water-soluble resin in a shell and containing hydrophobic resin in a core. a substrate layer; a recording layer formed on the front surface side of the substrate layer and containing a color developing material that develops color by heating; a protective layer formed on the further front surface side of the recording layer; an intermediate layer on the front surface side of the recording layer and on the back surface side of the protective layer, the intermediate layer being at least partially in contact with the recording layer; and a printed layer formed on the back surface side of the substrate layer, wherein the recording layer contains a first irregular reflection suppression component for suppressing irregular reflection in the substrate layer, the recording layer, the intermediate layer, and the protective layer, the first irregular reflection suppression component is an organic material having a melting point lower than a color developing temperature of the color developing material and has an average particle size of 1 μm or less, the intermediate layer contains a second irregular reflection suppression component for suppressing irregular reflection in the substrate layer, the recording layer, the intermediate layer, and the protective layer, the protective layer contains a binder and a filler, the filler contains colloidal silica, and in a state before the recording layer develops color, the substrate layer, the recording layer, the intermediate layer, and the protective layer are transparent, the second irregular reflection suppression component is a core shell-type particle containing a hydrophilic resin or water-soluble resin in a shell and containing hydrophobic resin in a core. <EOS>