Abstract: A handling apparatus adapted to be installed on a crane with a boom for loading and unloading materials comprises track device installed on the crane and at least two carrying devices suspended from the track device. The track device includes at least three track sections situated substantially parallel to each other. The track sections are connected to the respective adjacent track sections so that two elongated endless tracks slightly offset in the longitudinal direction thereof are formed. Each carrying device includes a carrier and a pair of crabs situated on the track sections for suspending the carrier under the track device. The crabs are arranged on the carrier so that when the carrier is oriented perpendicular to the track section, the two crabs are located on the track sections remote from each other, and when the carrier is oriented parallel to the track sections, the two crabs are located on the remaining track section.