A printer (10) for groups of products (101) supported on a table structure (100) comprising at least one opening (11) for supplying the tables (100) and a plane (14) for advancing a single table (100) towards a printing head (15), in which the printing head (15) is mobile only in a direction parallel to the advancing plane (14) and that, at the printing head (15), means are provided for moving the table (100) with respect to the printing head (15) mobile between a first position, in which the table (100) is at a distal position with respect to the printing head (15), and a second position in which the table (100) is at a proximal position with respect to the printing head (15), in the second position the table (100) being at contact with an abutment (41) arranged at a predetermined distance with respect to the printing head (15).