There is provided an ink sheet cartridge, which is provided with a cartridge body, a supply-side core tube, a takeup-side core tube, and spools detachably attached to end portions of the supply-side and takeup-side core tubes, respectively, and at least one intermediate connector that is interposed between at least one of the spools and corresponding one of the end portions of the supply-side and takeup-side core tubes. The corresponding one of the end portions at which the at least one intermediate connector is interposed id formed with a female engagement portion. The ink sheet cartridge further includes a male engagement member that is fitted into the female engagement portion from the outside so that the at least one intermediate connector is engaged with one of the supply-side and takeup-side core tubes having the female engagement portion.