An apparatus for printing closure bodies of containers having a transfer device that is associated in input with a feeder of closure bodies to be printed and in output with an unloader of printed closure bodies. The transfer device defines seats for a respective closure body to be printed which are provided with at least one resting region for at least one abutment portion defined on the outer lateral surface of the respective closure body. The seats are mutually spaced at preset distances and movable along a transfer trajectory. The apparatus includes a device for digital printing of the closure bodies to be printed which is arranged along the transfer trajectory.