A mine roof support has two sole-sliding elements, a bridge element connecting the sole-sliding elements with one another at the mine face ends of the latter, a roof supporting element supported on the sole-sliding elements, props supporting the roof supporting element on the sole-sliding elements, a displacing arrangement for displacing the sole-sliding elements and connected with the bride element, a guiding arrangement located between the sole-sliding elements and including two laterally spaced guiding rods connected at their mine face ends with a support element and at their backfilling ends with the bridge element via displacing arrangement, wherein a carriage is positively incorporated between the guiding rods of the guiding arrangement. The carriage carries a cylinder-and-piston unit which connects the carriage with the guiding arrangement at the backfilling end of the latter. The carriage also has a coupling member which extends in backfilling direction and connects the carriage with the displacing means at the backfilling end of the latter.