In a pneumatic tire (20) on which a transponder (1) is mounted, a securing member (3) for securing the transponder (1) is fixed to an inner surface of the tire in an area (S) between a tire maximum-width position (A) and a bead toe (B). Thereby, a large centrifugal force and a large impact force do not act on the transponder (1) storing various pieces of information, and the transponder can be mounted quickly and securely. Also, the weight of the transponder is remarkably reduced, and thus uniformity of the tire (20) is enhanced. Additionally, dynamic balance correction is made easier. Even in a large tire, reduction in durability is minimized through suppressing heat generation and heat accumulation of the tire (20) due to the transponder (1) and the securing member (3).