A storage box (10, 12) for a dye ribbon cassette (33) which is provided with a laterally outwardly extending handle (28, 29) at each lateral side allowing easy gripping of the cassette, said storage box being a generally rectangular enclosure having a top, bottom, two side walls and a rear wall, a front opening (18) giving access to the box and a door (19) for closing such opening, and a slot (22) in each side wall extending up from the front end of the box in the direction of the rear wall, the height and the configuration of said slots being such as to allow insertion of a cassette in the storage box through its front opening while the handles fit in said slots, the outside portion of the handles remaining outside of the box thereby allowing gripping of the cassette.