The utility model provides an even can not harm the ink box of black container owing to well bolt under the condition of loading and unloading the action for printing device yet. Ink box (1) utilize black container (10) that are formed by the thermoplasticity membrane material that can fill predetermined china ink, can supply black container (10) male as the extranal packing body (20) of outer container and establish on the length direction of black container (10) a tip and can with block portion (30) the formation of printing device's (100) box installation mechanism (130) block. In addition, the inside of the black supply portion (13) of the one end on the length direction who locates black container (10) is equipped with and is arranged in sealing or open bolt (15) of supplying with the opening (14a) of oral area (14) to the state that all covers pole portion (15b) all the time with the slip that has or not ink box (1) when loading and unloading is equipped with cladding component (17) of the pole portion (15b) that is arranged in this bolt of protection (15).