An electronic apparatus, a light-transmissive cover member, and an electronic device are disclosed. The electronic apparatus may include an image display device that includes an image display surface and a light-transmissive cover member. The light-transmissive cover member is arranged such that at least part of the light-transmissive cover member faces the image display surface. The light-transmissive cover member is a single crystal that contains alumina (Al2O3) as a main component. Due to the light-transmissive cover member, the transmittance of light having a wavelength of 260 nm is less than 92% of the transmittance of light having a wavelength of approximately 550 nm.