Slide rail

A slide rail comprising:

• a lower rail that is fitted to a vehicle structure member with use of a fixing member;
• and
• an upper rail that is disposed on a side of a seat body, and supported to be slidable with respect to the lower rail, wherein:
• in a cross-section of the lower rail taken along a direction orthogonal to a longitudinal direction of the lower rail, the lower rail includes a lower face portion that is fastened to the vehicle structure member with the use of the fixing member, paired side face portions that extend upward from respective ends of the lower face portion in a width direction of the lower face portion, paired upper face portions that respectively extend inward from upper ends of the side face portions such that the upper face portions extend in parallel with the lower face portion to face the lower face portion, and paired flange portions that respectively extend from inner end portions of the upper face portions such that the flange portions respectively extend in parallel with the side face portions to face the side face portions;
• and
• a discharge structure is provided in the flange portions, and the discharge structure allows a foreign substance, which enters an inside of the lower rail, to be moved beyond the fixing member and to be discharged when a force is applied such that the foreign substance is moved toward an end portion of the lower rail.