To provide a printing method to a disk holder capable of simply enabling printing in large quantities and not increasing working cost, in a printing method to the disk holder wherein a disk protecting part and a disk holding part are integrally molded.

In a printing method to a disk holder 7 equipped with a disk protecting part 71 and a disk holding part 72, printing is applied to either one of or both of the surfaces among the upper and rear surfaces of a flexible sheet 22 by a predetermined printing method and, thereafter, the flexible sheet 22 is molded by a press 32 to integrally mold the protecting part 71 and the holding part 72. Since printing is performed previously, the printed disk holder 7 can be simply formed in large quantities.