Handling device (5) for a rock drill rig (1) for handling drill string components for a drill string, wherein the handling device includes a linear guide (6), a slide (7) being displaceable along the linear guide (6), and, supported by the slide, a gripping device (8), being displaceable between a drill string position in the rock drill rig and a delivering position outside the rock drill rig. The gripping device is supported by a swing arm which is swing drivable around a first rotational axis (VI). The swing arm (21) is swing drivable in respect of the slide (7) around a second rotation axis (V2). The swing arm support (22) and the swing arm (21) are swing drivable around a third rotational axis (V3) for swinging the gripping device (8) to the drill string position. The invention also concerns a method and a rock drill rig.
