To secure the reliability of a sensor mounting part and allow easy mounting/removal of a sensor or battery replacement without causing the rotational balance of a wheel to collapse.
The automobile wheel 11 consists of a rim 12 and a disc 13. A thick portion 12a is formed in the tire mounting range of the rim 12 in such a form as not collapsing the rotational balance, and on the opposite side of this thick portion 12a to the tire mounting part, a sensor mounting part 12b accommodating the sensor 2 and a small hole 12ab to put the sensor mounting part 12b in communication with the side where a tire is mounted are provided. This eliminates the problem of reliability of a conventional sensor consolidated with a valve, in which the mounting part of the valve is easy to loosen to result in slipping off from the wheel, and there is no risk of generating a collapse of the rotational balance of wheel originating from the sensor being installed in one part of the wheel protrusively, and it is possible to perform easily the mounting/removal of the sensor and also replacement of the battery.
HINO MOTORS LTD