Abstract: A run-flat tire that includes a tread portion, sidewall portions, and bead portions. The sidewall portions being provided with a side-reinforcing rubber having a crescent-shaped cross section. At least one circumferential groove extending in a tire circumferential direction and plural rows of circumferential sipes continued in the tire circumferential direction are provided in a tread surface of at least one tread half-width region of a pair of tread half-width regions bordered by a tire equatorial plane. At least one shoulder portion circumferential sipe is provided in a shoulder land portion, and at least one inner circumferential sipe is provided in an inner land portion. A sipe width of the shoulder portion circumferential sipe is larger than that of the inner circumferential sipe, and a sipe depth of the shoulder portion circumferential sipe is smaller than that of the inner circumferential sipe.