The picker (2) has a longitudinal adjustment device (14) comprising an end that is supported around a rotation axis (24) at distance from a pivoting arm (10) provided at a retaining arm (6). An end of a support element (20) is supported around another rotation axis (26) at the pivoting arm in a frame (28) of the picker. The frame forms a curved path (30) along the retaining arm that is connected with the pivoting arm. The adjustment device is motor-actuated by a hydraulic cylinder (14a) at the retaining arm.