Provided is a frame structure of a vehicle seat capable of exhibiting high strength against impact. A front link 151 close to the center of a vehicle comprises two link plates 1511 and 1512, and the link plates 1511 and 1512 are suspended between an upper connection shaft 112c provided to a corresponding cushion side frame 11 and a lower connection shaft 423 of a fixing bracket 422 provided to theupper rail 42 of a slider 40, and arranged so as to flank the cushion side frame 11 and the fixing bracket 422 of the upper rail 42. The cushion side frame 11 supported by the two link plates 1511 and 1512 is highly strong due to being supported on the upper rail 42 at two ends.