Abstract: A seat adjuster includes upper and lower track members having interfitting U-shape cross-section side portions which are slidably guided relative to each other by runners of low friction plastic material. The track members are slidably supported relative to each other by a shoe of the same material. A latch member includes a U-shaped locking portion which is receivable within slots in the side portions of the upper track member and a pair of a plurality of slots in the lower track member to releasably lock the track members to each other. Seat mounting brackets have hook shaped portions which are hooked to the base wall of the upper track member to releasably secure the brackets thereto. The brackets support a vehicle seat on the upper track member. One of the brackets has provisions for mounting seat belt restraints thereto with the loads imposed on the upper track member by such restraints being resisted by the interfitting side portions of the track members.