Abstract: A register punch system for printing plates has several punch modules for an interior drum printing plate exposer in which the printing plate is arranged inside a cavity formed of a segment of a circle. The punch modules are arranged next to one another on a base plate at one end of the cavity outside an inside of the cavity in which the printing plate is located. The punch modules each have a guide block arranged on the base plate, a stamping punch guided inside the guide block, a connecting rod for actuating the stamping punch and a stripper plate arranged on the base plate at the end of the base plate facing the cavity and through which the stamping punch is furthermore guided. The stamping punch has a cutting finger at the end that reaches through the stripper plate, the cutting finger reaching over the end of the printing plate. The stamping punch is actuated through the connecting rod, so that a punching is carried out at the end of the printing plate during the drawing back of the stamping punch.