Provided is a run-flat support for pneumatic tire, which support is improved in durability while still achieving a lightweight. A run-flat support 1 is constituted of an annular shell 2, and elastic rings 3. In a lateral cross section of the annular shell 2, the annular shell 2 has: an outer circumferential side formed in a plurality of convex support potions 2a each bulging outward, and a concave linking portion 2b linking the convex supporting portions 2a; and a pair of right and left leg portions 2c extending radially inward respectively from the supporting portions 2a on the corresponding sides in a bifurcating manner. The elastic rings are mounted respectively on ends of both leg portions of the annular shell 2. The body of the annular shell 2 is formed of metal or ceramics, and a fiber reinforced resin layer 4 is attached at least to an inner circumferential surface of the linking portion 2b, the fiber reinforced resin layer 4 including reinforcing long fibers which arranged to intersect with the circumferential direction.