There is provided a sensor mounting structure, the structure including (i) a sensor device that detects at least information in front of a vehicle, (ii) a support member that houses part of the sensor device and is attached to a base member provided on an inner surface of a front windshield glass, and (iii) a display device that displays at least an image of what is in back of the vehicle, the display device being attached such that its angle is adjustable, to a lower end portion of an arm member having upper end portion that is attached to the support member. A space is formed between an outer surface of the part of the sensor device housed in the support member and an inner surface of the support member.