Abstract: The invention relates to an apparatus for cleaning a ground surface of synthetic grass and a filler comprising a frame (4), moving and supporting means (5) arranged on the frame (4) for moving the apparatus over the ground surface, cleaning means for the filler arranged on the frame (4), wherein the cleaning means comprise at least one cleaning space for the filler and an air pump (14), wherein a suction side of the air pump (14) is connected to the cleaning space, wherein supply means (25-29, 30) are arranged on the frame for supplying the filler to the cleaning means. Moreover, a pressure side of the air pump is connected to the supply means.