An outdoor image irradiation apparatus (1) includes an image light emission device (3) and a polarizer (4) for image light, and further includes a light attenuation member (5) to attenuate sunlight that comes from outside the outdoor image irradiation apparatus and enters therein. The light attenuation member (5), the polarizer (4) and the image light emission device (3) are sequentially located on an optical path for the sunlight.