Longitudinal adjuster and vehicle seat

A longitudinal adjuster for a vehicle seat, comprising at least one rail pair which is formed from a first rail and a second rail, wherein the rails form an internal channel and the first rail is displaceable relative to the second rail in the longitudinal direction,

• wherein a spindle nut which is connected to the second rail and a spindle which cooperates with an internal thread of the spindle nut and has an external thread are arranged in the internal channel,
• wherein a spindle gear mechanism, which can be driven by a motor and which cooperates with the spindle, is arranged on an end of the first rail,
• wherein a damping element or a damping module is provided and arranged such that the spindle and the spindle nut are held in a pretensioned manner relative to one another in the axial direction and/or in the radial direction,
• wherein the damping element or the damping module comprises at least one contact portion arranged at an outer axial end of the spindle nut and which is inserted into an opening of the spindle nut and partially encloses the spindle.