An infrared-light reflective plate reflects an infrared-light ≧700 nm including a substrate of which fluctuation of retardation in plane at a wavelength of 1000 nm, Re(1000), ≧20 nm, on a surface of the substrate, at least two light-reflective layers, X1 and X2, formed of a fixed cholesteric liquid crystal phase, and, on another surface of the substrate, at least two light-reflective layers, Y1 and Y2, formed of a fixed cholesteric liquid crystal phase. The reflection center wavelengths of X1 and X2 are both λX1 (nm), and the two layers reflect circularly-polarized light in opposite directions; the reflection center wavelengths of Y1 and Y2 both λY1 (nm). The two layers reflect circularly-polarized light in opposite directions; λX1≠λY1; and refractive anisotropy of X1 and X2, ΔnX1 and ΔnX2 satisfy ΔnX2<ΔnX1. Refractive anisotropy of the light reflective layers Y1 and Y2, ΔnY1 and ΔnY2 satisfy ΔnY2<ΔnY1.