Concave with at least one removable insert

The invention relates to a threshing concave (34) having a supporting structure, at least a releasably fixed to the supporting structure or be fixed insert (74) having a screening surface and a movably supported on the bearing structure retaining member (90) movable between a holding position, in which it extends into an opening (114) in the insert (74) and the insert (74) in a working position on the load-bearing structure is fixed, and a release position, in which it is not in the opening (114) and the insert (74) can be removed from the supporting structure.