An object of the present invention is to provide a heat wave shielding material which can be manufactured by a simple method without using a complicated manufacturing method or a high cost physical film-formation method, maintains excellent visible light transmittancy, exhibits high heat wave shieldability, and, furthermore, is excellent in strength such as impact resistance. The heat wave shielding resin sheet which has a maximum transmittance in the visible light region and at the same time a minimum transmittance in the near-infrared region exhibiting strong absorption is realized by dispersing hexaboride fine particles such as LaB6 as a heat wave shielding component in polycarbonate resin or acrylic resin. ITO fine particles and/or ATO fine particles can be dispersed together with the hexaboride fine particles.