To provide a saddle support portion that can ensure excellent sliding by improving a conventional linear bearing unit to make a rolling element circulate in a rolling track indefinitely.

In this saddle support device, an outer member 2 surrounds an inner member 1 by forming a gap 8 at least partly, and a rolling bearing is put within the gap 8, which bearing supports the inner member 1 linearly for the outer member 2, and a spring element 5 is placed to support the inner member 1. The rolling bearing is formed by a linear bearing unit 9 having a rolling-body return guide, and the rolling member 13 rolls rolling-body tracks 14, 13a and 15. At least one track is formed on the unit 9 and at least another track is formed on the member 1.