A ground compactor for compacting ground material (10), comprising at least one compactor roller (22) rotatable on a machine frame about a roller rotation axis (W) substantially orthogonal to a longitudinal direction (L) of the compactor and a vertical direction (H) of the compactor and extending substantially in a transverse direction (Q) of the compactor, with an edge processing device (24) associated therewith for processing a side edge (38) of compacted ground material (10), wherein the edge processing device (24) comprises an edge processing disk (26) rotatably supported on a disk carrier (30) about an edge processing rotation axis (K), characterized in that the edge processing rotation axis (K) is set or can be set at a first angle of incidence (W1) with respect to the transverse direction (Q) of the compactor in the longitudinal direction (L) of the compactor.