To realize an ensurance of an excellent run-flat durability by inhibiting a reduction of a comfortability to ride during usual traveling.
The run-flat tire is provided with a carcass 4; a bead filler 6 disposed in adjacent to an outer periphery of a bead core between a body part 4b and a winding back part 4a of the carcass; and an inner liner 7 positioned at an inner surface side in a tire width direction of the carcass 4. A rubber-reinforcing layer 8 is arranged at an area corresponding to at least side wall part 2. A circumferential insert 9 constituted by a rubber coated layer of cord having a high elasticity and extending to a tire circumferential direction is arranged between around an outer periphery of a bead core 5 and the tread maximum width position.