Heat-ray shielding film, heat-ray shielding transparent laminated base material, and automobile mounted with the heat-ray shielding transparent laminated base material as window material, and building using the heat-ray shielding transparent laminated base material as window material

A heat-ray shielding film comprising a compound having a heat-ray shielding function, a selective wavelength absorbing material, a polyvinyl acetal resin, and a plasticizer, wherein

• the compound having the heat-ray shielding function consists of composite tungsten oxide particles expressed by a general formula MyWOz (wherein M is an element of one or more selected from Cs, Rb, K, Tl, In, Ba, Li, Ca, Sr, Fe, Sn, Al, and Cu, satisfying 0.1≤y≤0.5, and 2.2≤z≤3.0) and having a hexagonal crystal structure,
• the selective wavelength absorbing material has a transmission profile in which a transmittance of a light having a wavelength of 550 nm is 90% or more, and a transmittance of a light having a wavelength of 450 nm is 40% or less,
• the selective wavelength absorbing material is a quinoxaline compound,
• a weight ratio of the compound having a heat-ray shielding function and the selective wavelength absorbing material (compound having a heat-ray shielding function/selective wavelength absorbing material) is in a range of 99/1 to 70/30.