To provide a run flat tire having excellent run flat performance, being excellent in steering stability on a dried road surface and a wet road surface at non-blowout and attaining enhancement of processing property and low fuel consumption property (low rolling resistance).

In the run flat tire, a steel cord includes a single twisting structure or a core-single layer sheath structure comprising 6-10 steel raw wires having a raw wire diameter of 0.10-0.20 mm, the hitting number of steel cords is 40 number/50 mm or more, and a distance between adjacent steel cords in the belt layers 8a, 8b is 0.3 mm or more. In the run flat tire, the tread rubber 3 includes the rubber composition in which 20-150 pts.mass of silica and 1-30 pts.mass of a silane compound represented by the following general formula: R1xR2yR3zSi-R4-S-CO-R5 are formulated relative to 100 pts.mass of a rubber component comprising a natural rubber and/or a synthetic diene based rubber.