A seat rail cover for a seat rail includes a first longitudinal section and a second longitudinal section. The first longitudinal section includes a first cover element and a first support element. The first support element extends in a longitudinal direction of the seat rail cover and protrudes from the first cover element transversely to the longitudinal direction. The second longitudinal section includes a second cover element and a second support element. The second support element extends in longitudinal direction and protrudes from the second cover element transversely to the longitudinal direction. The first longitudinal section is movable in longitudinal direction of the seat rail cover with respect to the second longitudinal direction from a non extended state to an extended state. Such a seat rail cover provides a variable length and may improve the dispersion of loads applied to the cover elements of the seat rail cover.