Seat slide structure

A seat slide structure comprising:

• a screw rod adapted to be attached to one of an elongate-shaped lower rail fixed to a vehicle body to allow a longitudinal direction thereof to extend along a frontward-rearward direction of the vehicle body, and an upper rail fixed to a seat to allow a longitudinal direction thereof to extend along the frontward-rearward direction of the vehicle body and adapted to be relatively movable with respect to the lower rail in the frontward-rearward direction;
• a nut member screwed with the screw rod;
• and
• a nut-holding member holding the nut member,
• wherein the nut-holding member includes:
• a holding body having an anchor section adapted to be fixed to a remaining one of the lower rail and the upper rail, a front segment disposed in a position frontward of the nut member, a rear segment disposed in a position rearward of the nut member, and a lower segment disposed in a position beneath the nut member to connect the front segment and the rear segment therethrough;
• and
• a rib disposed in at least one of two positions on left and right sides of the holding body to extend along an axial direction of the screw rod, and fixed at least to the front segment and the rear segment of the holding body to reinforce the holding body.