A solar radiation shielding fine particle dispersion body containing a thermoplastic resin, solar radiation shielding fine particles, a solar radiation shielding fine particle-containing masterbatch, a solar radiation shielding resin formed body formed into a predetermined shape using the same, and a solar radiation shielding resin laminate including the solar radiation shielding resin formed body stacked on another transparent formed body. A liquid solar radiation shielding fine particle dispersion body, including a mixture of solar radiation shielding fine particles and at least one selected from an organic solvent and a plasticizer dispersed therein or a solar radiation shielding fine particles including a powder solar radiation shielding fine particles dispersion body, obtained by removing a liquid component from the solar radiation fine particle dispersion body upon heating, dispersed in a resin component, wherein the solar radiation shielding fine particles are solar radiation shielding fine particles containing calcium lanthanum boride fine particles.