Abstract: A paper edge trimmer for a printer using pin-feed paper with holed edges has a edge trimmer body that fits on a support member in close proximity to a feed roller. In several embodiments, the body has two opposing portions joined by an integral hinge and separated by a split to permit the body to be pinched apart and installed on a support rod. Several alternative embodiments are shown for securing the body to the printer. The cutting edge extends down through the score line of the paper to separate the holed edge portions from a main portion on which matter is printed.