An infrared transmissive product includes a main body configured to cover both a light-emitting unit for emitting infrared light and a light-receiving unit for receiving infrared light in an infrared detector. The main body is transmissive to infrared light. The main body includes a base member that absorbs visible light and a red light absorbing layer disposed on a rear surface of the base member in a traveling direction of infrared light from the light-emitting unit. The red light absorbing layer absorbs red light in a wavelength region of 700 nm to 900 nm.