The invention relates to a printing wheel for a rotary printer comprising a plurality of type rings (6) positioned side by side on a cylindrical support (3). On their outer periphery said type rings (6) carry printing types (9), while on their inner periphery they are provided with internal toothing (10) capable of meshing with a pinion (11) which, by means of an adjusting spindle (14) connected for co-rotation therewith, is axially slidable into the planes of the individual type rings (6). By means of the pinion (11) the type rings (6) can be rotated relative to one another on the support (3) to bring selected printing types (9) into a predetermined position of adjustment. In order to avoid that during adjustment of a type ring (6) the adjacent type rings (6) are carried along a locking member (16, 17) is provided on the adjusting spindle (14), on either side of the pinion (11), for rotation relative to the adjusting spindle (14), and is secured against - axial shifting. The locking members (16, 17) are in positive engagement with the type rings (6) adjacent the type ring (6) whose inner toothing (10) is meshing with the pinion (11). The locking members (16, 17) are in positive engagement with the support (3).