An X-ray detector, an X-ray photographing apparatus including the X-ray detector, and a method of manufacturing the X-ray detector are provided. The X-ray detector includes a photoconversion layer configured to convert an X-ray into light having a wavelength range that is different from a wavelength range of the X-ray, a sensing layer arranged on the photoconversion layer and including a plurality of pixels configured to output the light as an electrical signal, a protective layer arranged on the sensing layer and protecting the sensing layer from physical shocks, and an anti-static layer arranged on the protective layer and preventing an electrostatic charge from being introduced into the sensing layer.
