A photoconductive layer for use in a radiation imaging panel which records an electrostatic latent image representing a radiographic image, formed of a bismuth-mixed metal oxide Bi12MO20 so as to exhibit a first light reflectance at a first wavelength of 750 nm and a second light reflectance at a second wavelength of 350 nm, where M is at least one of Ge, Si, and Ti, and the first light reflectance is seven or more times greater than the second light reflectance.